Here are couple of locations in your iphone file system which can be really handy while adding or deleting any contents on/from the file system instead of GUI.
Ringtones:
/var/stash/ringtones
Camera Pics:
/var/mobile/Media/DCIM
Installous Downloads ( If Installed ):
/var/mobile/Documents/Installous/Downloads
Cydia AutoInstall ( If Installed ):
/var/root/Media/Cydia/AutoInstall
Installed Applications:
/var/mobile/Library/
UnLim Videos Downloads( If Installed ):
/var/mobile/Library/Downloads/
Voice Memo Recordings:
/var/mobile/Media/Recordings
