If you work at a computer adjust the monitor so the top of the screen is at eye level. Use a document holder that puts your work at the same level as the screen.
If you use the telephone a lot, use a headset or speaker phone. Don't cradle the phone on your shoulder.
Adjust the seat of your car to a more upright position that supports your head and lower back. Make sure that you are not reaching for the steering wheel while driving. Your arms should be in a slightly flexed, comfortable position.
Use proper lifting techniques,Lift with your knees, not your back.