For a slightly different take on the subject and figuring out how to get targeted traffic onto your promoted links, you must have a look at Affiliate Marketing: Instant Traffic to Affiliate Links. A quick look at the reviews will help you decide if this is the exact course you are looking for. Sometimes the right approach is what is required to make a campaign work, this one might just work for you.
The problem with affiliate marketing, like many other home business options, are the so-called gurus and get-rich-quick programs that suggest affiliate marketing can be done fast and with little effort. Odds are you've read claims of affiliate marketing programs that say you can make hundreds of thousands of dollars a month doing almost nothing ("Three clicks to rich!"). Or, they suggest you can set up your affiliate site, and then forget it, except to check your bank deposits.