I don't really update it. I don't have many pictures of myself and I think I've said enough about my ideas to provide a hint of indication as to the type of person that I am.
I just changed mine last night. I saw a picture I liked and decided to be spontaneous. Couldn't think of anything to write, though, so I just settled for the picture.
After about 5 months of having the same profile and info, I decided to change it. Now I just change the info every few days or weeks, though I might oneday change the pic too.
No idea how that even happened...