I think mouthshut is the best site where one can make easy money and as well as share their experiences both good and bad with others and help others in choosing good products. I have been writting reviews in mouthshut for about two month now. I have already redeemed 880 ms points and I have a balance of 400 ms points in my account write now. And this is when I just spend half an hour on coursera every two weeks.
It is a very trusted site and very easy to use. You just have to provide your account details and then you can easily earn money.