iTunes - sync with wi-fi
Connect to iTunes with the cable, go to iPhone's summary and check "Sync with this iPhone over WI-FI" then press apply button.
ERROR
    iTunes fails to detect iPhone over WI-FI
SOLUTION1
    restart iPhone or restart iTunes or (restart iPhone and iTunes)
SOLUTION2 - for those running Windows 7 in VMWare
    change VMWare network to bridged
SOLUTION3
    keep the iphone open while using WI-FI (temporary set auto-lock to never)

Disable iTunes automatic backup on every sync
see https://discussions.apple.com/thread/6083556?tstart=0
Run this command using cmd:
iTunes.exe /setPrefInt AutomaticDeviceBackupsDisabled 1

Make own ring tone
http://makeownringtone.com/

Copy a playlist from Clementine to iTunes
Open the *.xspf file (Clementine's playlist) with VLC.
From VLC save/convert the *.xspf file to a *.m3u file.
From iTunes import the *.m3u file.
When importing a second time (let's say for a playlist update) you'll have to first/after remove the previous playlist's version from iTunes otherwise you'll end up with 2 playlists with the same name (but different).

Export Clementine playlist files to directory
Select files in a playlist
Right click on them
Choose Organise files ...