I've just finished my monthly profile/resume check. I'm so glad I've finally got this cumbersome task in manageable shape.
Here's what I do: I've got an automated task reminder set to come up once a month on the 20th of the month. In that reminder, there's a list of all of the places where I've got an online profile, (8 including my website), as well as the different versions of my resume (3 acting ones, 1 teaching one, and the CV/Master List). I go down the list, visit each profile, and make sure it's up to date - all of the credits are on the resumes, my current projects are still current, and my latest news is still the recent stuff. Sometimes I get all 12 done in 1 sitting, sometimes it takes 2-3 days, but when I finally mark the task 'complete' it's great to know that I've got it done, and no one's looking at stale outdated info if they try to find me online.