Chiropractors do more harm than good. Best you find a good witch doctor! Have him look at your head while he's at it.
I have had a great deal of success with chiropractors in correcting injuries I've inflicted upon myself, stupidly. Maybe 12-13 years ago, I twisted while trying to carry a portable TV by myself and felt a pop. Had to set the TV on the pool table and hit the ground in pain. I had injured it previously doing something as stupid and had suffered through a few weeks of walking around like an old man (I was 35) taking baby steps and feeling further pangs when I stepped wrong. A friend recommended I see his chiropractor, and in two visits, he had my spine lined back up and the muscles relaxed and good as new. Also did the x-ray thing and showed me abnormalities in my lower vertebrae that made my back prone to injury when I did stupid stuff. Of course, they all want that ongoing periodic adjustments to continue the revenue stream, but don't underestimate what they can do for you.
Jim is correct in that there are incompetent ones as well, which is why you should get a recommendation from someone whose opinion you value. I went to one who was into some kind of pressure point pocket of pain chemicals thing, thinking he needed to find them pockets and smash them (I'm sure the science is more sound and complicated than that). He found one of those pockets somewhere between the spine and shoulder blade, dug his thumb into it, and had to scrape me off his ceiling. I told him if he ever did that again, I'd reach around and pull the first organ I could find, giving him an instant sex change. Never went back.
Be a good patient, too (I'm not one), and do the exercises they tell you to. Seeing as how you spend your life on your butt, the inversion gizmos that dope and gerkebi have recommended would likely do you wonders on your down time. You can get one of those small, hand held laptops and post upside down, if you're concerned about your daily average going down.