I have before!! Hook, Line, and Sinker!!!
Well the First KEY to really making an affiliate program work for you is just by sticking with the one program you've signed up for until you make a profit. It gets quite easy to keep signing up for program after program in hopes that you will finally hit pay-dirt. What has happened is that now you are spread so thin in your ability to market a single program effectively.
Marketing A Single Affiliate Program is the First Key to Success because:
You should learn all there is to know about what kind of program you have joined first and see how others in that program are doing it. Learn what they do to become successful. Many programs offer coaches, partners, or loads of success oriented eBooks for you to read. Tackle all that stuff first until you get a grasp of what a successful affiliate marketer must do to make it to financial freedom.
Like with most affiliate programs, the program will provide you with a viable URL (website) address in which you can send prospects and get them to go check out what you are offering. Your goal is to send tons of traffic to that site URL and then, the website, in turn changes those visitors into your customers; further, your goal is also to turn those customers or visitors into a down-line group that will help you build an extra layer of residual income on top of your regular commissions. Step by step, a good affiliate program will lead you through to the mistakes and get you to market things in the right way.
You should spend 80% of your time marketing your affiliate program. Look at yourself like you are the #1 affiliate in the program. Do all the things necessary for that site's success, and when you make a comfortable, dependable income from it, then go out and pursue another top-notch affiliate program to be associated with.