It can be a kick in the pants rather than a slap in the face. Obviously, I can't hope to show you how to do this in a short introduction. But I will suggest some things to try, and I hope you can at least get started in the right direction. Take a deep breath, hold it for a second, and as you release it let your body go limp. Repeat this once more, and try to remember to do this every hour.
Stress increases muscular tension.
By remembering to relax you move leaps and bounds toward managing stress, toward taking better care of yourself. Your goal is to be relaxed in the present moment . . . There are many sophisticated strategies for managing stress, but I believe we can group them together as basic ways to take better care of ourselves. If you treat yourself well you lower stress and increase your stress resiliency, so you're able to bounce back when confronted with stressful events. Taking care of your emotional needs may be as simple as crying when you need to, finding appropriate ways to vent anger, or developing pursuits that lend meaning to your life.