If you own a Web site, chances are that you've already given thought to earning extra income from it.
Many people earn a nice second income by joining affiliate and revenue sharing programs.
The basis of affiliate programs is that you place an ad or link to a merchant on your site, and your visitors click on that link. You are essentially selling ad space on your site. You'll quickly discover that the sites earning the most money from affiliate programs are the ones with excellent content or valuable free stuff that keeps visitors coming back for more. So to be successful in this area, you really need to provide content to your visitors that make them want to return to your site, and recommend it to others. Most of your income will be based on the amount of traffic your site sees.