I just got a 2001 SSEi and I need a list of all the easy performance upgrades I can make to it. I have quite a bit of exsperience around cars so any more challeging upgrades are welcome to.

as far as cost, i have become a firm believer in improving existing oe parts, ie- porting

There'* also a lot of quick, easy mods to tackle: 180* T-stat, colder plugs, fenderwell intake and a smaller pulley. SCAN your car first though to be sure everything is up to par and that you've got no KR. If you have some decent experience, a set of higher ratio rocker arms would be good. I'd probably suggest a shift kit at least for the trans.
Check out the Techinfo link at the top of the page too. Do you have all the basic tune-up items taken car of first?

By the way, do you have a budget in mind? That'll give us a good idea of how far you can go.