If you are an owner f a website, you can easily earn money from your website by targeting Display Ads with Google Adsense. 1st You need an Adsense Account, Sign up for Adsense account Visit: www.google.com/adsense , When Google Approved your account then show content relevant ads on your website and earn money. Google pay you for valid ad click. You Need to learn must Google’s Terms and Conditions for Applying in Adsense.
Earn Money From Website or Blog:
It is a Best and Popular way of earn Money. For this you need a Information Based Blog or Websites. You can Provide Advertisement on your website or blog and make money. You can provide your own advertisement or from advertisement network. It is fully depend up to you. Most Popular contextual ads network use in blog or website: Adsense, Chitika, Clicksor, and Infolinks.
Freelancing is a large sector of make money online. 1stly you need to create a bid of work, those works you can do easily. As an example: Data Entry, Web Developing, creating preview, creating and post content, web design, Search Engine Optimization and too many works. Most Popular Freelancing Website: www.freelancer.com , www.odesk.com , www.elance.com Etc.
Products or Web service:
At present Maximum number of website do not have sufficient times to publish their products or services. You can easily earn money from it. Here you are media. When you sells a products or service by your refer, you can earn a commission for that. It is a Trust able way of make money online.