Adwords is probably the best paid method of getting quality traffic at the price you want, but I warn you , Adwords is NOT for the inexperienced, before using Adwords you should study all about it and learn how to get maximum exposure for the least amount. Here is Perry Marshall's definite guide to Adwords, it will save you tons of money trying to figure out what methods work best .
AdWords Definitive Guide - Double the Customers on your Website in 30 minutes or Less, with Google AdWords
I have personally read this great guide and recommend this to anyone looking to explode their income using only Adwords. Once you've mastered Adwords you can use it to rake in thousands for you , disregarding any other traffic method.