How much 'other' is there? If its 500MB or slightly higher (but usually a bit lower, around 300MB or so) then that's normal. It's things like contacts, notes, emails, texts, history, your Safari cache, application info (not the apps themselves, but things like game saves, caches, cookies, etc). If everything (even your music, videos, etc) is turning into 'other' data, then it's usually a corrupt flash drive. But like I said, if all your other data is split into Music, Videos, Apps, Photos, etc on that bar at the bottom of the screen, with a little bit of Other afterwards, that's totally normal.