Procrastination itself is stressful. Allow extra time for everything you have to do. That way, you'll have extra time instead of being time pressured. Saying no to projects that you don't have the time or energy for takes practice, self-respect, and a belief that everyone, everyday deserves time for themselves. Make friends with non-stressed people.
Nothing can promote anxiety faster than associating with other stressed-out people.
Check your breathing. Remember to breathe. Deep breathing helps to relax your entire body and reduce muscle tension. Become more flexible. Some things are worth NOT doing perfectly, and some issues are well to compromise upon, whereas others are clearly priorities.