Earn money from your own blog or website
The key is to generate as much traffic as you can, and to have your visitors click on ads and affiliate links. The more people visiting your site, clicking on ads, and buying affiliate products, the more income you can earn. As good as this sounds, income is generally more a trickle than a flood. But again, steadily building your site (or sites), and building traffic, is the key to generating a steadily growing stream of income.
Google Adsense is the most commonly used service for placing banner and text ads on blogs and websites. As I've learned to maximize Adsense income over the years, I've come to recognize this as one of the best income-generating opportunities available.
You can also incorporate in-text ads (the colored, underlined text with small pop-up ads). I like InfoLinks.com for this, and Kontera.com is another commonly used service.
Affiliate ads usually pay whenever a sale is made for a product. Amazon.com has one of the most well-known affiliate programs that all you to sell books or other Amazon products on your site or blog, and earn a cut of the sale.
Other good affiliate resources are Commission Junction at cj.com, LinkShare.com, and AssociatePrograms.com.