Of course there's also the 'Don't fight any battles until Dollet then have Seifer do everything with zell and squall knocked out.'

Ironic that that's what square tells you to do, and people tend to want to have squall get the extra exp instead.

*coughs* not that I've actually done that. I'm content with levelling as little as possible then going on long sprees at the islands closest to hell+heaven to get everyone's stats through the roof^_^