Download the Trulia mobile phone application (the "for agents" one, not the consumer version). It gives you the option to "check in" while you're showing a listing. When you do that, it will automatically post to your online profile.
You gotten great answers.FYI Iâ€™ve had trouble adding a note to the check-in I was able to add one before it "completed the checkin" for me but I canâ€™t find those notes posted anywhere.. Anyone else been able to add notes and locate them?