A Year of... what?

For book club this year, we had two selections that were memoirs of year long experiments.  The first was The Happiness Project by Gretchen Rubin, and I just finished The Year of Living Biblically by A.J. Jacobs.  (I just heard about the third book Jacobs wrote in this style, called Drop Dead Healthy (his first was about reading the entire Encyclopedia Britannica).  In a funny twist, I heard about it on twitter, via Gretchen Rubin.)  I also have a request in at the library for A Year of Living Generously by Lawrence Scanlan.

Have you ever thought of doing a year long project??  What ideas interest you?  What could you come up with that would stretch you, take you out of your comfort zone, and make you into a better person?  What would be just plain fun?  For your enjoyment and inspiration, I've compiled up a short list of year long projects...

Write a letter or card a day.
Origami!
Make a Sky Scarf - knit one row a day the color of the sky that day.
Live Generously.
Take a photo a day. (Google Project 365 & you'll find lots of ideas.)
Take a photo of yourself every day...
Crock Pot cooking (Every week for a year?)
Organization - Make a master list and work your way through your home, organizing every corner.
Read a book a week.
Start a blog & write about your project.  Or start a blog as your project.
Draw something every day.
Buy a Daily Journal and write a sentence a day. (I'm doing this for Nolan as his other baby book.)
Write a book; work on it every day.
Sleep 8 hours a night.
Keep all your shopping lists.
Find a geocache every week for a year.

What are other ideas for the list?  Have you done a year of something?