OK, I loathe the cheery, uber-chipper types. "Morning!"
I understand and appreciate the PMA approach. A Positive Mental Attitude is a good thing. In moderation. A lot of times, though, it just gets on people's nerves. Not everyone is down with that stuff.
Having said that... it's June 20. It's the Summer Solstice. It's the Longest Day. Enjoy it. Put it in your mind that today is going to be good, somehow. Find the bright spot. If you have a hard task or hard tasks in front of you, just know that by the time you close the door on it, you'll have made some progress. It may not be all you need, or all you want, but it will be something.
Try and find something to laugh about. Laughter is great... find something amusing, be it your child, a pet, a joke, whatever. It's June 20, 2012... one of maybe 80-100 solstices in your life. It's special, but really, every day is. No matter how shitty you think your circumstance is -- and it may well be -- at least for a moment today, treasure it.
Even you, Curmudgeon Cam.