If you are looking for a simple way to promote cpa offers, I highly recommend facebook. The great thing about facebook is that it literally takes only a few minutes to setup your campaign. You can from having an idea for a campaign to profits in a half an hour or even less. I know several guys who got their start on facebook. One of whom made $1,000/day consistently on his first profitable campaign.
Another reason I love facebook is the targetting. Because everyone on facebook has a profile, they have a ton of data on their users. You can target by age, gender, marital status, etc. And you can also target them further using relevant keywords.
When you login in to your normal facebook account, you’ll see on the bottom it says advertise. From there its very easy to follow. You give your ad a title, description, and provide the destination url. Also, you can provide a small image. You can grab images directly from your affiliate network.
Browse the top offers on your affiliate networks. As you do so, ask yourself what demographic each one would appeal to. Write it down (or type it down) and keep a small list. Then just setup up and test them out. Once you find a winner, you are usually able to scale up a lot. Facebook has millions and millions of users. To increase your profits, just increase your budget. 
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Social networks can be a real goldmine if you know how to monetize them. In Zero Friction Marketing, Saj P will be teaching you the insider secrets to banking thousands per day off the social networks. Get ready for it!