Mmmm.....you ask a good question grasshopper.
The quick-easy way is to use the following products after your car is washed:
Finish Kare Products:
www.fk1usa.com
Apply FX-100 Wax sealant
then apply product #425 (I'm addicted to it)
These two products are the easiest way to get a "quick" wax however I would strongly suggest at least a solid wax job as a base, described in the 2 links below :
Just Waxed
FK1 Waxing Guide
KRZ