How do you increase your chance to win in swagbucks?

United States
October 25, 2009 1:46pm CST
I just wonder how many people actually sign up with swagbucks? You have to make search by using swagbucks searching engine to earn their "bucks". Or you can make purchase through its website or refer your friends and other people to sign up its website. I make a couple of searches, and won a couple of "bucks" there. I just wonder if anyone has any trick or any advise I can take to increase my chance on swagbucks searching engine? It seems that all of my search results are dumb luck.