Do a problem or two in math or master some new vocabulary words as you eat a sandwich. On Cassette Tapes. Use Spare-time thinking. Make the most of moments immediately before or after class by recalling the main points from the last lecture as you're heading to class or by quickly recalling the points of a lecture just completed as you're leaving class. Your subconscious works while your conscious mind is resting in sleep.
Stress is tension.
There are also ineffective ways of dealing with stress. Drugs and alcohol are not positive, nor healthy ways of dealing with stress. If you've lived in Colorado for at least one year, it's your responsibility to prove physical presence and intent to live permanently in Colorado. Colorado State Income tax, rent receipts, lease agreements, W-2 forms, Colorado vehicle registration, etc. Submit to the Registrar's Office, CN 105 before registering for classes.