Sage advice for your neck and back

Is there a person on Earth who has never suffered from neck or back pain? I've dealt with both, luckily not at the same time. Here are a few DO's and DON'Ts for your neck and back -- these tips have stood the test of time according to Philadelphia chiropractor, Jeff Sklar:

• DON'T sleep on your stomach, DO sleep on your back. Side-sleepers, DO put a pillow between your knees.
• DON'T sleep on a flat pillow, DO find a pillow that structurally supports the natural curve of your neck.
• DON'T sit at a computer desk for too long, DO keep the computer monitor in front of you and at eye level.
• DON'T sit with a wallet in your back pocket (especially a thick, George Costanza wallet -- remember that Seinfeld episode?)
• DON'T lock your knee joints when bending forward, DO lower back stretches regularly, even when pain-free.
• DON'T cross your legs for extended periods, this decreases blood flow to the lower extremities and can cause pelvic imbalance. DO traction your lower spine in the pool by letting your legs dangle below you in deep water, using a flotation device to support your upper body.

Other than being a trusty back sleeper, I'm occasionally guilty of a few of those DON'Ts. What relieves your neck and back pain?