Easy Levelling Up and JP
This tricky can be done as early as the second battle although it's generally best to do it after that so you can choose what class the JP goes towards.
Make sure all your characters have the Squire's JP Up and the Focus skill. Without these this trick doesn't work as well.
A very simple trick. Get into a battle with some sort of chocobo. Kill off all other enemies and leave the chocobo alive. Get it to low health (when it crouches) and then wait for it to go into a corner and then circle it with your characters and it'll keep using choco cure if it's on low enough health. One character attack with a weak attack to keep it's health low. The others all use focus and then wait. This can go on forever.
This works as I spent an hour doing this trick and shot up 10 levels and gained over 4000 JP per character.
Added by: Eternal Skies Nov 2nd 2007, ID#1728