What mods to start with?

Just bought a 2001 gt and was looking for info on where to start and what products anyone can suggest or websites.

www.pfyc.com or www.3800performance.com are good places to start. Cold air intake and and u-bend delete are good for some quick hp.

Just listed these on the other post
http://www.automotiveforums.com/vbulletin/showthread.php?t=316456