1. Don't feel the need to express your manhood with the draw weight of your bow. Start light at a weight that you can draw fifty or sixty times in a half hour without waking up cramped into a pretzel the next day. You should be able to hold the bow straight up and down, in shooting position, and gracefully pull the string back to the release point.
2. Research the various major bow manufacturers and see what kind of history they have, what kind of shooter they aim for (ha ha). I have a great bow, but by a manufacturer who went under in the 1990s (at least I can't find them any more). If I were buying right now, I'd be inclined toward a Martin, just based on what I know of them from the early 1990s when I was last in the market for a bow. Hoyt and Oneida are also high on my list.
3. I wrote 1 and 2 based on the assumption that you'd pick a compound bow. There's nothing wrong with a longbow or recurve if you want to go that route, but it's a whole different way of shooting. With a compound bow, you can draw and hold. With a strong longbow or recurve, by the time you draw you'd better be pretty well ready to release.
4. Find a good archery shop in your area. I prefer small shops with knowledgable owners, but if all you can get to is a Mega-Outdoor-Mart, it's probably better than mail order. Make a few trips to talk with the people who work at the archery counter; figure out who really knows bows, and who just transferred there because selling furniture was too tough.
5. A bow isn't just a bow. This kind of goes along with #1. You need to have a bow fit to you in a number of ways. Draw length must be correct; bows generally come made with a small range of adjustability, but you want to get one that is pretty close at the middle setting. Draw weight must be within reason. The cam action should be comfortable for you. Bow weight must be within reason so that you can hold it up while you're getting the hang of aiming and firing. The bow should be balanced well, so that it doesn't tend to rock back or foreward when you loosen your grip hand (sometimes accessory weights are used to balance things out).
Other general suggestions: Go ahead and start off using a peep sight. This is threaded into your bow string, and it a great starting aid (IMHO). You might as well go ahead and use a string release of some sort (this is like a 'trigger' that you hold in your hand, with a strap around your wrist, which you use to grab the bow string to pull back and then release it). Some guys still swear by fingers to release, but I'm not one of them.
Plan on spending a lot of time getting good at the technical aspects of shooting a bow before you ever go hunting. If you can't hit a deer target at 60/70/80 yards with your bow, you have very little chance of making a clean kill in 'real hunting' at 20/30/40 yards.
I'm just a (lapsed) target shooter, I don't hunt, but I do enjoy shooting. Oh, check out this site that came up when I was googling for my bow manufacturer (Xi), it seems to have some decent tips:
http://www.nesportsman.com/articles/article57.shtml
Jim