For a basic tune up here are my recommendations
NGK TR6IX spark plugs (1 heat range colder but much better for car)
MSD wires
Oil change and all
Maybe air filter if its dirty

For suspension u can check out my ride thread or 91Parkave's thread for good stuff there.

For instance he and I both have
ZZP lower control arms
GMPP front sway bar
Strut tower braces
And custom made coil overs


You can see my new coil overs in the top right area. Haven't installed em yet though