Mummy From The Heart has set up this great weekly post for reasons to be cheerful, you can read all about it here. Basically the idea is simple write a post listing three things you are grateful / thankful for at that point in time.
A really simple but effective thing and something that I really wanted to be involved in as I think we easily forget things to be thankful for in the daily grind of life, and get wrapped up in moaning about things. More
And Then All I Thought About Was You 