Exchanging posts not only helps in bringing traffic but also helps in knowing about a lot of general things. One such site that I came across is freerice.com What one has to do is quite simple. Visit the site and you get a quiz like format wherein a word will be placed with 4 options which could be its possible meanings. play the game and for each correct answer you donate 20 grains of rice to the sponsors specified at the bottom of the web page. It is true and I was quite surprised to check the totals. Donating how much ever you can is also possible. Check the website and the main advantage for its users is that you can improve your vocabulary tremendously as there are up to 60 levels. Keep donating how much ever you can! Its worth it!