I like the period of lent. I love the pancakes and clearing the cupboards of Shrove Tuesday. 6 weeks is long enough to make some resolutions and affect some behavioural changes. Lent in 2006 helped me finally finish my masters degree. And at the end of Lent, there is the rebirth of Easter and the warmth of Spring.
Using the stairs at work (instead of the lift!)
Read more (aim for 5 books before Easter)