As important as it is to get good treatment for biomechanical problems, it is equally important to avoid negative behaviors at home and work that can perpetuate the problem you are having. The most important concept here is to think about your body positioning during activities and make sure what you are doing is safe, balanced, and not worsening any present conditions.
Improper desk and computer ergonomics are often a main cause of neck/back pain, arm pains, or headaches. There are many situations to take into account when considering your workstation ergonomics that can be reviewed here online through the CDC. OSHA has a very basic site with some nice graphics on the subject here for another perspective. Be particularly careful with laptop computers. Because of their compact size people tend to use them in a hunched over posture in locations that do not provide good support.
Bending over and lifting heavy objects both at home and work is another common situation in which people injure themselves. One should always keep a straight back when lifting objects from a lower level and allow the legs and butt muscles to do most of the work. Refrain from lifting things that are too heavy or poorly balanced.
Having good supportive chairs, mattresses/pillows and footwear are also important factors to consider.