One way to do this is to open an account at about.me. On this site you can continuously update your bio and all of your books, your blog sites, etc. Once you have it completed you can then place a link to this site on your Twitter account, add the link to your signature when you send out an email message to name two.
To see what I'm talking about regarding Twitter, you're invited to check out my account there:
The about.me link is on the left, right below my location.