It's a pretty long list... Last time i've tried to deactivate most extra stuff i was using via GUI.
Uptime is about ~4 days.
root@WRT3200acm:~# du -akLh /tmp | grep K ; df -h /tmp
4.0K /tmp/opkg-lists/reboot_telephony.sig
52.0K /tmp/opkg-lists/reboot_telephony
4.0K /tmp/opkg-lists/reboot_routing.sig
12.0K /tmp/opkg-lists/reboot_routing
4.0K /tmp/opkg-lists/reboot_packages.sig
264.0K /tmp/opkg-lists/reboot_packages
4.0K /tmp/opkg-lists/reboot_luci.sig
60.0K /tmp/opkg-lists/reboot_luci
4.0K /tmp/opkg-lists/reboot_darkmatter.sig
4.0K /tmp/opkg-lists/reboot_darkmatter
4.0K /tmp/opkg-lists/reboot_base.sig
52.0K /tmp/opkg-lists/reboot_base
4.0K /tmp/opkg-lists/reboot_core.sig
64.0K /tmp/opkg-lists/reboot_core
4.0K /tmp/opkg-lists/stangri_repo.sig
4.0K /tmp/opkg-lists/stangri_repo
544.0K /tmp/opkg-lists
116.0K /tmp/luci-indexcache
4.0K /tmp/luci-modulecache/6C7563692E687474702E70726F746F636F6C2E64617465
28.0K /tmp/luci-modulecache/6C7563692E7379732E7A6F6E65696E666F2E747A64617461
4.0K /tmp/luci-modulecache/6C7563692E7379732E7A6F6E65696E666F
4.0K /tmp/luci-modulecache/6C7563692E746F6F6C732E70726F746F
12.0K /tmp/luci-modulecache/6C7563692E7379732E697074706172736572
24.0K /tmp/luci-modulecache/6C7563692E6D6F64656C2E6669726577616C6C
20.0K /tmp/luci-modulecache/6C7563692E6362692E646174617479706573
68.0K /tmp/luci-modulecache/6C7563692E636269
8.0K /tmp/luci-modulecache/6C7563692E746F6F6C732E77656261646D696E
8.0K /tmp/luci-modulecache/6C7563692E6D6F64656C2E6E6574776F726B2E70726F746F5F707070
4.0K /tmp/luci-modulecache/6C7563692E6D6F64656C2E6E6574776F726B2E70726F746F5F686E6574
4.0K /tmp/luci-modulecache/6C7563692E6D6F64656C2E6E6574776F726B2E70726F746F5F646863707636
4.0K /tmp/luci-modulecache/6C7563692E6D6F64656C2E6E6574776F726B2E70726F746F5F6169636375
4.0K /tmp/luci-modulecache/6C7563692E6D6F64656C2E6E6574776F726B2E70726F746F5F367834
4.0K /tmp/luci-modulecache/6C7563692E6D6F64656C2E6E6574776F726B2E70726F746F5F347836
72.0K /tmp/luci-modulecache/6C7563692E6D6F64656C2E6E6574776F726B
12.0K /tmp/luci-modulecache/6C7563692E746F6F6C732E737461747573
4.0K /tmp/luci-modulecache/6C7563692E76657273696F6E
8.0K /tmp/luci-modulecache/6C7563692E737461746973746963732E6461746174726565
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E7568747470642E756874747064
12.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E6C7563695F737461746973746963732E6C7563695F73746174697374696373
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E61646D696E2E756369
20.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E61646D696E2E73797374656D
8.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E61646D696E2E737461747573
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E61646D696E2E7365727669636563746C
20.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E61646D696E2E6E6574776F726B
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E61646D696E2E696E646578
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E61646D696E2E66696C6562726F77736572
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E776F6C
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E7761746368636174
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E76706E2D706F6C6963792D726F7574696E67
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E75706E70
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E73716D
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E73616D6261
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E716F73
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E6F70656E76706E
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E6669726577616C6C
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E646E7363727970742D70726F7879
12.0K /tmp/luci-modulecache/6C7563692E746F6F6C732E64646E73
12.0K /tmp/luci-modulecache/6C7563692E6D6F64656C2E69706B67
12.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E64646E73
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E6263703338
12.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E616476616E6365645F7265626F6F74
4.0K /tmp/luci-modulecache/6C7563692E74656D706C617465
4.0K /tmp/luci-modulecache/6C7563692E636F6E74726F6C6C65722E6164626C6F636B
4.0K /tmp/luci-modulecache/6C7563692E6931386E
36.0K /tmp/luci-modulecache/6C7563692E64697370617463686572
24.0K /tmp/luci-modulecache/6C7563692E737973
20.0K /tmp/luci-modulecache/6C7563692E687474702E70726F746F636F6C
12.0K /tmp/luci-modulecache/6C7563692E68747470
12.0K /tmp/luci-modulecache/6C7563692E6C746E3132
4.0K /tmp/luci-modulecache/6C7563692E7367692E636769
588.0K /tmp/luci-modulecache
4.0K /tmp/resolv.conf.ppp
4.0K /tmp/adb_runtime.json
4.0K /tmp/dhcp.leases
4.0K /tmp/lib/luci-bwc/load
4.0K /tmp/lib/luci-bwc/connections
4.0K /tmp/lib/luci-bwc/radio/wl4
4.0K /tmp/lib/luci-bwc/radio/ath4
4.0K /tmp/lib/luci-bwc/radio/wlan4
4.0K /tmp/lib/luci-bwc/radio/wl3
4.0K /tmp/lib/luci-bwc/radio/ath3
4.0K /tmp/lib/luci-bwc/radio/wlan3
4.0K /tmp/lib/luci-bwc/radio/wl2
4.0K /tmp/lib/luci-bwc/radio/ath2
4.0K /tmp/lib/luci-bwc/radio/wlan2
4.0K /tmp/lib/luci-bwc/radio/wl1
4.0K /tmp/lib/luci-bwc/radio/ath1
4.0K /tmp/lib/luci-bwc/radio/wlan1
4.0K /tmp/lib/luci-bwc/radio/wl0
4.0K /tmp/lib/luci-bwc/radio/ath0
4.0K /tmp/lib/luci-bwc/radio/wlan0
60.0K /tmp/lib/luci-bwc/radio
4.0K /tmp/lib/luci-bwc/if/eth0.5
4.0K /tmp/lib/luci-bwc/if/br-lan
4.0K /tmp/lib/luci-bwc/if/wlan0
4.0K /tmp/lib/luci-bwc/if/bond0
4.0K /tmp/lib/luci-bwc/if/br-wifi_guest
4.0K /tmp/lib/luci-bwc/if/ifb0
4.0K /tmp/lib/luci-bwc/if/eth0.4
4.0K /tmp/lib/luci-bwc/if/pppoe-wan
4.0K /tmp/lib/luci-bwc/if/eth0
4.0K /tmp/lib/luci-bwc/if/eth0.1
4.0K /tmp/lib/luci-bwc/if/eth1
4.0K /tmp/lib/luci-bwc/if/ifb4pppoe-wan
4.0K /tmp/lib/luci-bwc/if/eth1.2
4.0K /tmp/lib/luci-bwc/if/ifb1
4.0K /tmp/lib/luci-bwc/if/eth0.3
4.0K /tmp/lib/luci-bwc/if/teql0
4.0K /tmp/lib/luci-bwc/if/wlan0-1
68.0K /tmp/lib/luci-bwc/if
136.0K /tmp/lib/luci-bwc
136.0K /tmp/lib
4.0K /tmp/etc/dnsmasq.conf.cfg02411c
4.0K /tmp/etc/dnscrypt-proxy-cfg0598eb.conf
4.0K /tmp/etc/dnscrypt-proxy-ns1.conf
4.0K /tmp/etc/igmpproxy.conf
4.0K /tmp/etc/miniupnpd.conf
4.0K /tmp/etc/collectd.conf
4.0K /tmp/etc/smb.conf
28.0K /tmp/etc
4.0K /tmp/hosts/odhcpd
4.0K /tmp/hosts/dhcp.cfg02411c
8.0K /tmp/hosts
4.0K /tmp/TZ
4.0K /tmp/.uci/dhcp
4.0K /tmp/.uci/dnscrypt-proxy
8.0K /tmp/.uci
4.0K /tmp/log/ddns/myddns_ipv4.log
4.0K /tmp/log/ddns
4.0K /tmp/log/sysstat/sa01
4.0K /tmp/log/sysstat
8.0K /tmp/log
4.0K /tmp/syscfg/ipa/topodb.devices.persistent/***
4.0K /tmp/syscfg/ipa/topodb.devices.persistent/***
8.0K /tmp/syscfg/ipa/topodb.devices.persistent
4.0K /tmp/syscfg/ipa/topodb.alias/Asus-Z-Notebook
4.0K /tmp/syscfg/ipa/topodb.alias/Asus-Z-Notebook
4.0K /tmp/syscfg/ipa/topodb.alias/***
12.0K /tmp/syscfg/ipa/topodb.alias
20.0K /tmp/syscfg/ipa
152.0K /tmp/syscfg/license/fw_license.pdf.gz
152.0K /tmp/syscfg/license
4.0K /tmp/syscfg/detected_hosts_history
4.0K /tmp/syscfg/.sysinfo_pswd
4.0K /tmp/syscfg/files-to-keep.conf
4.0K /tmp/syscfg/panic.md5
4.0K /tmp/syscfg/sysup
16.0K /tmp/syscfg/syscfg/syscfg.dat
16.0K /tmp/syscfg/syscfg
4.0K /tmp/syscfg/syspwl.lst
212.0K /tmp/syscfg
4.0K /tmp/board.json
4.0K /tmp/sysinfo/model
4.0K /tmp/sysinfo/board_name
8.0K /tmp/sysinfo
4.0K /tmp/state/dnsmasqsec
4.0K /tmp/state/network
8.0K /tmp/state
4.0K /tmp/lock/browse.dat
16.0K /tmp/lock/account_policy.tdb
4.0K /tmp/lock/gencache_notrans.tdb
4.0K /tmp/lock/gencache.tdb
4.0K /tmp/lock/group_mapping.tdb
16.0K /tmp/lock/share_info.tdb
4.0K /tmp/lock/printer_list.tdb
8.0K /tmp/lock/serverid.tdb
4.0K /tmp/lock/notify_onelevel.tdb
4.0K /tmp/lock/notify.tdb
40.0K /tmp/lock/locking.tdb
40.0K /tmp/lock/brlock.tdb
4.0K /tmp/lock/connections.tdb
4.0K /tmp/lock/sessionid.tdb
4.0K /tmp/lock/messages.tdb
160.0K /tmp/lock
4.0K /tmp/run/snmpd.conf
4.0K /tmp/run/dnsmasq.cfg02411c.eth0.5.dhcp
4.0K /tmp/run/dnsmasq.cfg02411c.eth0.3.dhcp
4.0K /tmp/run/dnsmasq.cfg02411c.br-wifi_guest.dhcp
4.0K /tmp/run/dnsmasq.cfg02411c.br-lan.dhcp
4.0K /tmp/run/miniupnpd.pid
4.0K /tmp/run/watchcat.pids
4.0K /tmp/run/led.state
4.0K /tmp/run/luci-reload
4.0K /tmp/run/wifi-phy0.pid
4.0K /tmp/run/ntpd.pid
4.0K /tmp/run/dnsmasq/dnsmasq.cfg02411c.pid
4.0K /tmp/run/dnsmasq
4.0K /tmp/run/hostapd-phy0.conf
4.0K /tmp/run/nmbd.pid
4.0K /tmp/run/smbd.pid
4.0K /tmp/run/dropbear.1.pid
4.0K /tmp/run/sqm/pppoe-wan.state
4.0K /tmp/run/sqm
4.0K /tmp/run/fw3.state
4.0K /tmp/run/haveged.pid
4.0K /tmp/run/config.md5
80.0K /tmp/run
Filesystem Size Used Available Use% Mounted on
tmpfs 250.5M 1.7M 248.8M 1% /tmp
root@WRT3200acm:~# free
total used free shared buffers cached
Mem: 513040 280268 232772 1712 6684 22236
-/+ buffers/cache: 251348 261692
Swap: 0 0 0
root@WRT3200acm:~# uptime
20:23:17 up 4 days, 5:08, load average: 0.01, 0.07, 0.08
Edit: Hopefully i did it right this time...