So I'm new to promoting clickbank products, and was thinking I would do that. How do you determine what is a 'good' product to promote? I remember someone saying that 'gravity' was one such indicator -- but what "number"? Like a gravity of 5? 15? 50? 500? I understand the higher the better, but what would be the bare minimum? As well, what information should I pay attention to in the other fields?