It is not always a great idea to put all your eggs in one basket; that is why in all of my websites, I use other alternatives of earning money.
The best resources you can include in your site to generate money is AdSense and affiliate link.
You can include both links in all your pages; however, you should test those pages to make sure you used the right affiliate link.
The most important factor for increasing your income is to constantly be tracking and testing your links.
When you include both channels in your site, you will get high ranks in the search engines because if someone searches for any of the keyword in either channel, there is tendency that your site will come up and the person might even go ahead to do or perform other purposes on your site.
I have made sales through my affiliate links most times when only the visitor is there to look for particular information which the keyword is in the other content.
The visitor ends ordering for the product I am promoting which increases my revenue.
It is very simple; the visitor is searching for terms on golf vacations and this is in my AdSense, when the search engine brings out the result and my site is listed, the visitor comes to my site and click on my ads.
If the information on the ads are not encouraging, he or she comes to look at other things I am offering on the site and with a good article promoting a product about golf vacations, he might decided to order which means I have just earned money from two channels.
When you do two things on a site which are inter-related, you have the chance of getting high rank in the search engines easily.
Submitting your site to different social book-marking sites might even get your site been placed under a red flag.
Most people do not know this and if only you can take it and apply it to your under performing website, you will be glad you did.