If you don't know where to start (or how to) your research, I highly recommend this book. It's not field specific, but not too broad either. It has a simple & friendly tone to it, making it an easy read and it will not bore you to death ;-) (important, since you have only 3 years to do it). Look it up in your library, or keep a copy (recommended) since it assist throughout your research, up till your writing up phase.