angry birds how to get 3 stars

Question

how do u get three stars in angry birds?

Answer 1

here's a walkthrough where the guy gets 3 stars in all levels: http://angrybirdsgoldeneggs.com/complete-angry-birds-walkthrough/

Answer 2

u have to use less birds and less time

Answer 3

The largest factor is how many birds you wind up using.  More birds left over nets you large amounts of points.