It depends on what your focus is, what kinds of blogs and sites you own, if you have big social media followings, and if you're planning to pay for traffic. What offers are you interested in?
I am a member of peerfly and I asked them and they asked me what type of traffic source that I was going to use..
yeah, where your traffic comes from goes a long way in determining what type of offer you should promote. If your audience likes giveaways, free things, and sweepstakes, you can promote things like Email Submits or FreeLotto sweepstakes. If you are buying traffic, you may want to focus on offers with a higher payout. Also, the country your traffic is from will help determine what offers work best.
First, determine the products you will be most likely willing to sell and to whom are you gonna sell them (aka target market).