Daily projects have become popular among designers and nondesigners alike. Taking a photo, making a painting, drawing an image, keeping track of certain data, or just simply writing down what you did. All of this creates the ability to compare one thing to another, reveals patterns, goes beyond human memory and pushes you to stick-to-it for a certain amount of time. These are just a few...there are so many who have done some seriously cool stuff :)
Here's a few that are really amazing:
Kate is a designer/illustrator who draws something everyday that she has purchased. She's been doing this since 2006.
One of the most popular daily projects right now is taking a picture every day - this one puts them all to shame
Photo of the Day
Nineteen years of one photo a day, 1979-1997 starting while he was in college, and ending the day he died at age 41.
Blog post with some good info about the project.
Feltron Annual Reports
Sort of the reigning king of daily life documenting coupled with information visualization
Blows ink onto paper and creates a monster out of it :)