Will you try something new, for 30 days?

I read an article in my newspaper today, from Matt Cutts, who proposed on TED to try something new, for 30 days Is there something you’ve always meant to do, wanted to do, but just… haven’t? Matt Cutts suggests: Try it for 30 days. video
For example, make a photo each day for 30 days, he tried to learn 30 new words, being thankful for 30 days thank someone/something each day, 30 days offline, etc.
Do you like this idea?
What would you like to try for 30 days?
My goal will be, to start running for at least twenty minutes each day.
Edit: Or you can decide to not do something.
Like no caffeine, no sugar, no car to work, etc.