Another successful entrepreneur I know keeps a gratitude journal, writing in it each day that which she is grateful for.

FORBES: Growing Your Business Through Practicing Gratitude

Two entrepreneurs in the Washington area in September launched Thankfulfor.com, an online gratitude journal that's shared through social networks so people can feed off one another's thanks.

CNN: The power of gratitude, a year-round gift

For eample, have you ever written in a gratitude journal?

FORBES: Atlantic Philanthropies and Charles F. Feeney: How Wealth-in-Action Redeems Us All

Make it a gratitude journal and celebrate your blessings.

FORBES: Ten Holiday Gifts To Give To Your Career

"When you do something like that over and over every day, it changes your whole psyche, " said one of Thankfulfor.com's founders, Jen Consalvo, 37, who has kept her own gratitude journal for several years.

CNN: The power of gratitude, a year-round gift