Healself till MP is empty, walk into residence, come back out, heal self again....repeat.
this is done on the steps of your apartment and then just repeated.
Also works for
Cure spells for healing magic
Protect/protectra spells, shell/shellra spells, bar-spells, actually.... any spell that can be cast on yourself for enhancing
Just walk out of your mog house, run through your MP, walk back in
Wash, rinse, repeat
for enhancing, if you have several different versions of the same spell, cast them all... example:
Protect ==> Protectra ==> Protect 2 ==> Protectra 2 ==>> etc etc etc
just make sure to cancel the effect in your status bar before starting the chain over again or you wont get gains