Assuming you have a CHL. During the course most instructors go over the various options available. Like others on here have said, the type of firearm and your body style, your comfort level with the options and your typical attire have a major bearing on choices.
My carry weapon is Colt Defender. My attire consists almost exclusively of cargo pants (BDU) and cargo shorts with deep front pockets and shirts designed to be worn not tucked in (as opposed to the so-called style of wearing shirts with tails not tucked in.
For normal out and about in town, I mostly use a DeSantis pocket holster (works well but you’ve gotta tighten the belt to keep pants from dropping). That also allows for t-shirt ops. For travel, I mostly use a OWB Desantis mini scabbard (great conceal ability) or Galco snap-on holster (the less expensive non-leather version. I also have a couple of Blackhawk Serpas (good for securing the weapon but not as concealable. Every holster I have cost less than $50 and the ones I use the most cost less than $30 and they do a good enough job for me. Before you go spending $100+ on a holster, try a lower cost item in a quality brand. If you ask around you will find that some people have a drawer full of holsters that they never use (trial and error can get expensive).
Often overlooked is the BELT. It should be substantial and the SAME width as the holster belt opening to prevent sagging (the old that guy keeps pulling his pants up, he must be packing).
Shopping the net will keep you occupied until Dec. 2012.
Yah, I’m licensed. My instructor never went over the options, either time, mostly just the laws.
I’m medium height, little bit of a belly but not too bad, I’m just not a large enough guy to hide something on me very well. That is why I have used the belly bag. I really like it, weapon is accessible and if I need to hit the head at Wally World I can unsnap it and drop it in the cart for She Who Must Be Obeyed to guard while I take care of bidness.
There are so many options out there. I like some of that 5.11 stuff, may take a closer look at their stuff.