get a comlete coil over kit, I wish I did! It gives you full adjustability, height, damper, ect.....
sway bars, front and rear, is the best bang for your buck when it comes to suspension (so I am told).
I have a front strut tower brace, it made a HUGE difference entering and exiting turns, and I expect the rear to do the same.
http://www.PDM-Racing.com has a special on them for $40 each.
If you really want to go all out, you can replace your bushing all around, pdm also carries these.
Since you are kinda tight for cash, you may either want to wait and save up for a coil over system, or just start off with the smaller items, sway bars first?
oh, and do a search please, this topic has been discussed a billion times, you should be able to find some good input with a search, and it will save you time, instead of sitting by the cpu and hoping someone replies.
good luck!
PauL