Check out this website, which challenges people, National Novel Writing Month-style, to write a letter for every day in February:
In the month of February, mail at least one item through the post every day it runs. Write a postcard, a letter, send a picture, or a cutting from a newspaper, or a fabric swatch.
Write back to everyone who writes to you. This can count as one of your mailed items.
All you are committing to is to mail 24 items. Why 24? There are four Sundays and one US holiday. In fact, you might send more than 24 items. You might develop a correspondence that extends beyond the month. You might enjoy going to the mail box again.
I love writing letters. I don't do it as much as I would like—I owe letters to two good friends at the moment—but it's a fine way to get perspective on what's going on in your life, and an even better way to gain a deeper understanding of your friends. And coming home to something personal in the mailbox is one of the great pleasures. I think this is a great idea.