One of the most overlooked affiliate marketing tips has to do with traffic testing and tracking. How do you know which one to choose? You really do not. You’ve got to try one for a while and see how that works, or try a couple of at a time and match them with one another. When you find some that are obviously outperforming others, invest more time, effort, and/or money into those and let the others go. Last but not least, have a look at the support that you can offer your clients. Yes, that’s's right. While this can trouble you, it is also one of the factors which will separate you from other affiliates who aren’t answering questions. This also potentially means that you’re going to have to buy the item and not just promote it blindly, without knowing its real features, benefits, potential problems, etc.