Treat everyone you meet as though they'll be dead by midnight.  Sound crazy?  Think about it.  You'll make them feel like a million bucks and in turn, so will you.

Want an instant pick me up?  Shower someone with kindness.  Just as a smile takes years off your appearance, making someone feel awesome with a compliment or act of kindness will make you 'feel' just as good.

Try it.  At work, with your family or a complete stranger.  Kill someone with kindness.  You'll be a better person for it.