Always try to follow the instructions to get three stars in each stage.

Get 3 Stars on Every Level.It’s rare to get a three-star score by using all the birds in a level’s arsenal. The 10,000 point bird bonus is too big to pass up. If you destroy almost everything in sight and still get only one or two stars, it’s a sure bet that you’ll need to accomplish the same result with fewer birds.

This may sound obvious but the key to eliminating all the pigs in the fewest number of birds is to make every shot count. For example, if a bird destroys only two or three blocks and no pigs, you’ve almost certainly wasted the shot. Kiss your three-star score goodbye. That’s why, when I first start playing a level, I search for initial shots that do the most overall damage. There is at least one critical exception here (which I’ll describe more later): occasionally, you may need a bird to do minimal damage because it is necessary to clear the path to the next shot you want to take.