IF YOU ARE WEARING A T SHIRT.
I don't care wear you are, in class, the library, at the internet cafe, your room.
Take your right hand and grasp your left sleeve at the top of the opening.
In one fluid motion, move your right hand (still grasping the left sleeve) in an clockwise arc over your head.
You just discovered the smoothest, most time efficient way to remove your shirt. EVER.