To loosen up tight muscles, do gentle muscle stretches for 15 minutes. Go for a walk, go shopping, get a haircut. Try to maintain regular sleep patterns. Try breaking down your assignments into smaller, more manageable units. Set attainable goals for yourself on a daily, weekly, and monthly basis.
Laughter is the best medicine.
Watch a funny sitcom or movie. Negative thoughts can trigger a physical fear reaction. Anticipate stressful situations and prepare for them. Limit your caffeine intake. Caffeine elevates negative stress symptoms.