Step 1. Get off the computer. Get outside even if you dont feel like it, make yourself. Sunlight has shown in studies to be able to make you feel better, and lack there of, well, makes you feel worse.
Step 2. Exercise. Yet another thing that will make you feel better and will help combat depression. Also helps distract the mind.
Step 3. If your on anti-depressants, STOP taking them. (Warning: A known side effect of anti-depressants is suicidal thoughts. Thats a big effing S/E if you ask me.) Go out and be with friends or aquaintances, as they will help you through this tough time in your life.
Step 4. Eat better. If you fuel your body with crap, your gonna feel like crap, mentally and physically.
Step 5. Notre Dame's next NC season is just around the corner. That alone is worth living to see.