My T is the one responsible for the clock watching, which helps me a lot. I had a T who had a clock facing me and it drove me nuts because I would keep focused on how much time I had left and not allow myself to really get into anything!

My T always says "we have a few minutes left" or "it's almost time to wrap up for today" which is helpful. Either she or I will often bring up a more mundane topic, like tv or books, and then we check the schedule before I head out. It's helpful to take those two minutes to get back to the moment. I then usually take a few minutes in my car reflecting/journaling before I drive home.