Be sure to keep your personal life separate from what it is that you are advertising. It's okay if your fans find the personal photos and personal blog but keep them at different locations on the web. Don't post your photos from the party last night where wore the lampshade on your head (i.e. got trashed) next to your new publicity photos. Get two accounts, one for your friends and one for whatever it is that you are promoting. You can have one for work and one for play, people will eventually find the personal one, but that's not the one you are promoting, it's a subtle difference but the professional address is the one that you're going to be printing on business cards and other materials.