Usually to find the information I'm about to tell you would normally cost you in excess of $37 to learn. So be thankful
Now, there are many different techniques, strategies, tactics, whatever you want to call them, for marketing affiliate products. I've used them all, but only one has worked for me time and time again, without flaw.
My best technique for affiliate marketing is the following...
Create a digital product that informs and PRE-SELLS the reader on an affiliate product.
I've done this countless times to help promote my affiliate links over time. I put out an ebook a year and a half ago called "The Only Money Maker", and I'm still getting sales on affiliate products I was pre-selling inside the guide.
I would divulge content related to whatever it was I was trying to promote, and then offer the product as an 'easy solution' to whatever problem/subject that I was writing about.
Plus, I make all my customers sign up for my email list. My autoresponder for it would send out several pre-sell messages over a period of a week or two, to help drive the sale of the product I was promoting.
To help spread the word in regards to my book, I included an affiliate program (either clickbank or $7 Secrets script)
Then I just mingled with other email list owners in my niche, and get them to promote my guide in exchange for a more than generous commission.
So, everyone's promoting my guide, and my backend (ebook + autoresponder) is selling my affiliate products for me.
There are days where I don't even jump on the computer, and I still score sales, because someone put an ad for MY ebook in their autoresponder...so I'm being handed leads on autopilot, and my autoresponder is selling the affiliate product.
Also, after people paid for my book, I'd make sure that on the download page AND the first email from my autoresponder would tell them about the affiliate program so they can 'make their money back'.
This would get them to promote, and keep it viral. So, viral promotion to an ebook/autoresponder that sells my affiliate links.