When you're trying to balance work, school, and life, not to mention the things life throws at you--like disagreements, storms, illness, trouble with pets, inconsiderate neighbors, yada yada--it's a good idea to eliminate stress wherever you can.
I have a little trick that sounds silly but really works. In fact, it's a true story that UPS follows this advice. Really.
Plan your errands so that you're making only right turns, and you will save time by not sitting at lights and waiting forever to turn left.
Here's the full story: Improve Your Time Management with Right Turns
Try it. You'll like it.