Make sure your top scoring high performance pages include a call to action.

This is not difficult or time consuming, but it can make a real difference in getting results. You can easily provide a visitor with some sort of reason to take action now.
Content Rich Pages
Create a content rich, informational site which is loaded with quality articles, tips, free advice, and tutorials, and keep your options to buy a product very subtle.
The Truth about the Keyword Meta Tag
The Keyword Meta Tag argument
There are various Meta tags we use at Customer Street but the keyword Meta tag causes by far the most arguments and disagreements between Webmasters and SEOs.