I'd suggest doing all the WiFi side quests first, and then do what Elpizo said:
Originally Posted by Elpizo
Start training to beat the Iron Giant if you haven't already, get Onion Knight, get every job level for every character to lv99 for every Ultimate Equipment, get max HP and get every character to lv99. Should keep you busy for a while if you haven't done this already.
In addition, if you haven't got summons like Odin, Leviathan or Bahamut yet, you should try to get them.
People dislike FFIX because they're horrible idiots. - Kawaii Ryűkishi "One-Winged Angel" is far and away the best final boss song ever
composed. - Kawaii Ryűkishi