Also . . .
Make a list of features you would like to have on the bow.
Like split limb vs. solid.
Compound vs. recurve.
Amount of let-off.
Poundage range.
Weight.
Draw length range.
Single cam, cam & 1/2, dual cam.
How much you can spend on the bow . . . Knowing that there are several hundred dollars still to spend on arrows, rest, sights, release, etc.
Whatever you know about bows, you know a lot about what you want before you start shopping.
Try going to huntersfriend.com, there is a lot of info on their site that help making the potentially large financial decission of what to buy.