Amongst the better Indian sites on the net for contesting and winning prizes is contests2win.com. All the contests usually have a game which has to be played followed by some questions on the promoting companies products. I have won a few t-shirts on this site, not any big one as yet but I am sure that someone is winning. Besides this you also earn points for participating in the contests which can be exchanged for gifts. The Nescafe brainstorm is a good daily contest which I participate on a regular basis along with the daily polls. It is a site to go during lunch hours or at leisure.