Call to Action

Hi All.
I'd like to fine tune the guidelines for writing here. Up until recently you've all written fine articles with information for the readers regarding one subject or another.
This was good for a while but we want to crank it up a bit and get people to buy the products we promote on the sites. I don't mean that you should take a certain product or a group of products and start talking about it, because any product may change or be removed from our site.
Ultimately, what I am asking you to do is this; use a call to action in your articles (if you're not sure what a call to action is, this sentence is a nice example).
Tell people to buy the e-books, get loan and insurance quotes, etc.
More examples for a call to action you can use:
Get one of the e-books on the right and see the magnificent tattoo designs...
Click the link at the bottom of the article to get FREE insurance quotes.
Get one of the books offered here to learn more about lock picking.
Order a gift online and get it straight to your door.

A call to action is actually ordering people to do something but being nice about it (don't start bossing the readers around but still tell them what to do).
Be creative and use 1 to 3 calls to action per article.