Do them later if you really want to complete everything.
JUST PLAY ON PROUD HONESTLY IT'S REALLY A HASTLE DOING EVERYTHING IN THE JOURNALS. To do everything though after getting Sora, play each mini-game (except the junk one and the posting one) for about 30 minutes. You have to post really good scores (100 points in bandstand for example or put up 20 posters in under 30 seconds!). For the magic carpet negative combo and take all abilities off, equip a powerful keyblade and do two hit combos against everything. It still took me 6 runs to get 65 points on that minigame.
