Must haves:

Clean Installer - an external program to be sure you don't get hacks with lots
CEP (Color Enabler Package) - Makes it so objects that were not intended to have recolors can

Other than those, just download what you want from ModTheSims2.com and PaySites.MustBeDestroyed.org/booty, the later of which is a collection of all the items people try to charge money for made free.