Log in indication [on hold]

I'm collecting best practice when it comes to the indication to the user that he's been logged in. The system I work on has different options in it, in which there's been a whole function of self service. If the user decides to get out of the self service section, he may go from one page to another, but I wouldn't want to force him to log off. I've seen a green circle indicating log in. Any other ideas? Thanks!