This blog post describes what a Hunter's real purpose is in groups, rather than being primarily DPS as most people think. I'm fairly sure BRK links to it somewhere as well, but the link is very much worth reposting. Although BRK mentions his belief that we're a damage class, (and I'm not going to disagree with that entirely) as the above linked article says, more than any other single thing, Hunters in groups are pullers and tactical co-ordinators. CC can be used in conjunction with pulling for the primary purpose of ensuring that the rest of the group never gets more mobs than it can handle at any one time.
Hunters themselves aren't the only people who need to read it; people who play other classes and group with Hunters do too, especially Warriors...because more than any other class, in terms of pulling, tanks tend to insist on trying to do what is really our job, and then claim that we don't have a reason to exist at all.
"And these words shall be in your heart. You shall teach them diligently to your children, and shall talk of them when you sit in your house, when you walk by the way, when you lie down, and when you rise up. You shall bind them as a sign on your hand, and they shall be as frontlets between your eyes. You shall write them on the doorposts of your house and on your gates."
- Deutoronomy 6:6-9