1. Adsense by google is a genuine and highly successful revenue making tool. All you have to do is create a blog/website with genuine content. Place google ads on strategic locations throughout the site or blog. As traffic of your site increases, number of conversion increases and your adsense revenue increases. There are lots of people making money using Google adsense.

2. Revenue sharing opportunities - To maintain a website or a blog is a hectic task, if you don't have the time and resource for that, then the best choice is to go for revenue sharing. If your content is good and worth reading, you can make a fortune from it. Hub pages is one among them.

3. Affiliate Marketing - This is also a good option and a very high paying one too. Here you will place affiliate links in your site/blog. If someone signs up for you will get a predecided persent of the price of the product. It can even be $50 for the sale of a product.

4. Yahoo/Bidvertiser - These are the other rival ad networks to adsense. These are not that good in terms of payout compared to google adsense but is worth a try.

5. Guest Blogger Opportunities - There are various sites offering revenue for those who are ready to post in their blog. The terms may be in basis of flat payout or on an advertisement space sharing basis.

6. Article submission - There are sites paying for submitting articles. It is another revenue sharing method. Etalkindia is one among them.They accept articles and tips from users and give a payout of upto $1 per article.