MSN Money has a fantastic article on very basic wealth building concepts.
While the entire article has great material, my favorite is the "Part-time millionaire" mentioned at the bottom.
This is a concept my wife and I try to take seriously by actively pursuing new ways to add to our income without over working ourselves.
The article also mentions the years from 18-30 being some of the most important years as far as wealth building is concerned. It doesn't really hit on the fact that this is the age range where many people are the least concerned about saving, until they are shown how important a few extra years of compound interest is!