You can see a lots of products listed in this website under various categories, you can write reveiws for them. Those products under the $ sign carries cash credits depending upon the quality of the review. Also you could join in the review contest we announce from time to time. And write knols and blogs(for the products that we have announced), and provide us with the links and we will review them and rate them, and depending upon the points, you get cash credits. Write answers for the product queries asked in yahoo answers and give the link here and for them you get Rs. 2 for each link, depending upon the quality of the answers you have provided. Check on the announcements tab regularly, you will be able to get a clear picture. You can also get revenue from google adsense.