What really helps me is watching Animes and movies in Japanese. I sometimes leave subtitles on, but a lot of times I take them off to see if I really grasp and understand what's being said. Also, like was mentioned before, playing games like FFI in Japanese while learning your Kana is a very good idea, although if you're like me and you've played through FFI with every feasible party the game could throw at you and the prospect of rushing the game again just turns you off, then you might want to find a different game...