Shaving/Trimming
Shaving or trimming pubic hair is the most common and popular way to maintaining it. This can be done at home with an inexpensive razor or hair trimmer. Many women do this as part of their regular grooming, along with shaving their legs and underarms. This is also a versatile method of hair management. You can shave along the bikini line to keep any stragglers from poking out while simply trimming the rest of it short. It can be done in the shower with a suitable bikini trimmer. This is also the easiest way to create a design in your pubic hair if you want something between a full bush and completely bare skin. Overall it's a great cheap and relatively painless way to groom.
Waxing
Another way to groom your pubic area is to get a bikini or Brazilian wax. This involves having someone apply hot wax to your hair and ripping it out until everything you don't want is gone. While you can do it yourself, I strongly recommend going to a reputable salon to have a professional take care of you. The difference between a bikini or Brazilian is the amount of hair removed. The bikini wax will only remove hair around your bikini line, while leaving the middle of your bush intact. The Brazilian removes everything, including fine hairs around the anus. There are various styles in between, including the French wax which leaves a "landing strip" above the vagina and the American wax which doesn't include your backside. The downsides are the cost (if you pay a pro) and the pain factor. However, the benefits include softer skin than you get with shaving, and a longer smooth period between grooming sessions. And no sharp stubble, since you aren't cutting the hair.
Laser hair removal
Going further up the price scale we have laser hair removal. This requires several trips to a salon where a specialist will zap your hair roots with a laser to essentially burn them off. While this works better on light-colored skin with dark hair, professional clinics can work with most skin tones and hair colors. The upsides are that you should only need to do this treatment once and you will remain hair free for the rest of your life. It's also less painful than waxing. On the downside, this is the priciest treatment option by far, although it may actually be less expensive over the long run than paying for waxing on a regular basis. You also can't change your mind - if you get a laser Brazilian and later decide you want a full bush, you'll be merkin shopping.
So that sums up pubic hair grooming options. Of course there is nothing wrong with leaving alone what nature gave you, but if you ever want to touch it up or take it off, there are several methods available.