F ind opportunities for flow, the experiences that take us out of our temporal consciousness. Practice concentration, making a deliberate effort to focus your attention on the task at hand. Forget yourself, lose the observing eye that is always evaluating you critically. Even at work, even if you hate your job, you will like yourself better if you find ways to make it challenging and stimulating. If this means you work harder and the boss will be pleased with you, that's just a risk you've got to take.
L earn to relax.
Take a course in yoga, or t'ai chi. Take care of your body, and learn to listen to it. Eat healthy but delicious meals. When we neglect or abuse our bodies, we're only being passive aggressive with ourselves. We're treating ourselves as if we're unworthy of love.