Exercise and connect. I agree with my colleague who says to exercise. I also recommend that you build new connections through faith, volunteering, or joining a book club. You can also look for a therapeutic small group in your area. You can find a certified group psychotherapist through this link: http://www.Agpa.Org/ under "need a group therapist?" group is a wonderful way to learn and grow through the loneliness.
Stay active. Exercise is a great way to relieve stress. Your body releases endorphins during exercise, which can help you feel calm. If you exercise 30 - 60 minutes a day, your stress levels can improve. When stressed, take 5 slow, deep breaths with your eyes closed, then roll your shoulders forward 5 times, then back 5 times. This will slow your heart rate and release tension in your neck and shoulders.