Starting Bonuses and Penalties
If you don't get a decent bonus from the wheel you spin at the beginning of the level or you have penalties you may find that it will make completing that particular level impossible. When this happens take it as a learning experience and plan a strategy for the next time.
Right Bird
Learn the powers and advantages of each of the birds so when you select a one for a level you are able to choose a bird that is best suited for it. Remember that once you start a level with a given bird you will be unable to switch it to another bird until your either restart or your current bird runs out of tries.
Bomb Bird
More often than not you will encounter random obstacles at the start of every new turn, sacrifice the Bomb bird to blow them away and clear a path for your other birds. There will be other obstacles in the level which you will have to deal with but they won't be as bad as the first ones you encounter.
Power Ups
As you play you will be able to win power-ups which you should try not to waste. The best way to manage power-ups is to attempt a level a couple of times without them before deciding to use them.
In-Level Boosts
Analyse the level design paying particular attention to bomb crates, items that change your direction and obstacles as they are all placed where they are to help you complete the level. You just have to figure out how to take advantage of them.
You can earn extra goodies by connecting the game to your Facebook account, doing this will also enable you to check your performance against your friends and ask them for energy.
Walkthrough Videos
If you are struggling with a level use the following videos to help you complete it.
Part 1 - Levels 1 to 30 - Bird Island
Part 2 - Levels 31 to 60 - Bird Island
Part 3 - Levels 61 to 90 - Bird Island
Part 4 - Levels 1 to 30 - Piggy Island