Fire pits can really vary and it's a good idea to do some research about the different types and figure out what works best for you and your backyard. One of the biggest differences in fire pits is what they use for fuel.

Charcoal - This is most often the fuel used for people who want to cook over their fire pits as it provides a more-controlled and steady heat when compared to wood. It also doesn't have to be chopped down to size. Be sure to get a chimney starter for cooking as lighter fluid lends a nasty taste to food, increases fire danger, adds to expense and is bad for the environment. 

Gas-line - Some fire pits can accommodate a gas line. These tend to be stationary fire pits instead of mobile ones. Using a gas line can make for more hassle on the building/installing end, but it's an option some people want alongside or instead of wood or charcoal. For areas where sparking is a huge fire danger, gas is sometimes a good option.

Wood - This is most people's favorite fuel for their fire pit. You get nice light and heat from wood, but you have to make sure to your wood is both well-seasoned and kept dry or you'll wind up with really smoky fires. Also, having properly dry wood and tinder allows for much easier starting of fires.

Right now, I'm living in a shared household with a small backyard and I live pretty frugally. However if price were no object and space was not a consideration, hands down I'd have one of the fire pits that you see here.

I took this picture at a fire circle gathering in Oahu, Hawaii that I went to in December of 2008. Their fire bowl is gorgeous, isn't it? This lovely and understandably-pricey fire bowl is handmade by a man named John T. Unger. He makes an entire series of artisanal fire bowls crafted from recycled propane tanks. He makes a whole variety of size and designs.  Each winds up being one of a kind as they are hand-drawn and cut one-by-one by the artist. What you see here is the design called "The Great Bowl O' Fire" and it's the largest of the bunch. Maybe if my Hubs do really well this year, I can get one of the smaller designs.

Learn how to properly start a fire - Too many people just fling huge chunks of wood into their pits, douse the entire thing with lighter fluid and toss on match.  That's a waste of good wood, the lighter fluid is toxic and with just a bit of effort, the whole thing can be cheaper and easier.

Have the right tools - To make using your fire pit easy and safe, you'll want to have fire gloves, some tools for moving burning logs and a screen cover on your pit (to contain sparks and embers). 

Be fire safe - Set up your pit so that it's not touching any surfaces it could burn.  Make sure no nearby grasses or plants could be ignited.  Have a garden hose or fire extinguisher close nearby in case of an emergency.