WHy is that earning money promoting clickbank products always seem to very tough, at least for me. I have tried various methods to promote clickbank products but could not even generate a single sales through it. Is it really a waste of time or can earn more?

You can earn Very well with clickbank products. You just have to know how. Unfortunately, I can't help you much there. My best experience was an adwords campaign I threw up and linked straight to an anti-virus/spyware software affiliate. Right off the bat, I was making like $20 to $30 every 30 min to an hour.

It was late, so I decided to add a bunch of keywords for more traffic and went to bed. I woke up owing Google several hundred dollars and no clickbank sales. What's worse is I didn't know which keywords were making the money before I added the others. Big, Big, Big mistake on my part.