People are always trying to figure out if there is a magic formula to winning. What if I enter at a different time every day? What if I log in to a different computer? What I wear my lucky Hawaiian tiki necklace? Will it make a difference? No, the key word for most sweepstakes is “random”.
If you make a habit of reading sweepstakes rules, you know the sponsors will tell you that a winner is selected by random draw. The big companies secretly select random winning sweepstakes times. If you're the first person to log in after the desginated tame, you're a winner. It would be nice to know when those randomly selected times will hit, but it is closely guarded secret. Wait! Don't I have to spin the wheel or play a game to see if I won? No. The wheel will spin and the graphics will blaze, but it all comes down to getting lucky and logging in at the right time.
Smaller websites and blogs use more informal methods of picking a winner. One way they do this is to use a site like Random.com. With this site, you can tell it how many entries you have total, and it will randomly select a winning number from among those entries. The blogs have also started using a sort of random selector called Rafflecopter. No matter which method the websites use, they all try to find fair, unbiased ways to randomly select a winner. Unless you're talking about true contests, but that's another sweepstakes discussion.