http://feeds.gawker.com/~r/lifehacker/full/~3/bf8uZviICJM/try-these-psychological-tricks-to-prevent-mindless-snacking-and-avoid-holiday-weight-gain Imagine this: Your friend just stopped by to drop off a plate full of cookies and some holiday cheer. Your co?workers are carting boxes of baked goods into work. Clients are sending over packages of chocolates and candy. Right now, some version of th..