Affilate sales or CPA...both? something else?

I'm aware of what they are but as i'm thinking of diving into one of these 'making money' online ideas..
i wanted to get feedback on what people think about Affiliate sales versus doing CPA versus something else? or just do a combo of both?

pros, cons, how much money to make, how easy it is to make it..

Thanks for ANY INFO!! :feedback: :hot_dog:'s & :drinking2's for everyone