For several years now, my wife and I have done a photo each day as a kind of visual diary. You can see these at:
http://365project.org/foxes37/365 (my wife)
Some people use this to
show off their excellent photography skills. I 'm afraid our photos are
more mundane. Some pictures are good, but most are very average. To us it is a visual diary. It is a good discipline too. I have much enjoyed doing it.