You go to Burger King after work. You're about to buy a Whopper. Then, all of a sudden, you remember seeing something on Facebook earlier that day. That the Burger King 10 minutes away is giving away Whoppers for free tonight, and would save you $2. Do you drive to that Burger King for the free sandwich? Sure.

The next day, you're at IKEA, buying a lamp for $80. When you remember that the Target 10 minutes away has the exact same lamp for $78. Do you drive to Target for the $2 savings. Probably not.

Is this irrational economic behavior? Yes, but only partly. If $2 is really worth the 10 minutes to us, we should always side that way. But, the reality is that the 100% burger savings completely outweighs the 2.5% lamp savings in our minds. It's a comparison issue.

Should it be? No. And remember that the next time you blindly say ok to a hidden $400 fee for your new car purchase.

Tim Ferris' 4-Hour Body has received a lot of press lately. Earned because of his prior revolutionary book the 4-Hour Workweek.

And although these titles may make Ferris sound like the world's laziest man, he's actually an obsessive compulsive about data. While many of his findings on exercise, weight loss and the female orgasm are receiving most of the publicity, he made one passing comment in an interview that should be a huge marketing game changer.

He talked about how good the regular process of giving blood is for your body - specifically in terms of lowering your risks for heart disease.

The long-time Red Cross slogan of "Donate Blood. Save a Life." depends solely on altruism. From a marketing standpoint, do you know what's a more compelling call-to-action than altruism? Anything else.

Donate Blood. Save Your Life. Now that makes me want to sign up.