Check
http://andymanchesta.com/ for some excellent links to all sorts of goodies.
You might want a demand scanner for spyware etc also. Superantispyware, AVG antispyware, Asquared, and SpywareTerminator (which is a free resident AS) all recommended, pick any two. Or three. Run a scan every so often.
[Edit]
SpywareTerminator now bundles a toolbar. Used to be optional. It's harmless...if you want a toolbar, that is.