The Reason: We all know some kind of energy vampire: The whiner, the naysayer, the chronic blamer, the jabbermouth, the frenemy ... dealing with these people is emotionally draining, which drags you down and depletes your energy. Yes, it's literally exhausting to be around these people.

The Fatigue Fighter: You can't choose your family or your coworkers, so your best bet is to play defense. Set time limits for recurring sob stories ("I only have five minutes"), hop on a "phone call" or excuse yourself to the restroom to avoid blabbermouths, and never encourage or reaffirm blamers.

If you're more of an offensive player, try calling up the friend who always makes you laugh -- she actually gives you energy. Ever notice how invigorated you feel after a good laugh session? Laughing improves blood flow, wakes up respiratory organs and suppresses stress hormones -- consider LOL-ing a little packet of aerobic exercise without the sports bra and sweating. If you can't arrange a date, choose the next best thing: some quality time on Funny or Die.