How would one that it is stressed, tense and anxious relax?

Start w a med. Eval. It may uncover underlying medical problems that need to be addressed. Cognitive behavioral therapy can be quite effective. Psych meds may be indicated. Aim for daily exercise, 8 hours of sleep /night ; good nutrition w 5 servings of veggies ; 4 of fruit per day. Try tai chi, yoga, qi gong, progressive muscle relaxation, deep breathing exercises ; meditation. Take care.