For those of you who frequent crowded drinking establishments, I strongly recommend the Rogano Crouch. Named after the legandary Rogano's bar in Glasgow (est. 1935), it involves cradling the pint right into the armpit with a twist of the wrist, thus ensuring minimum spillage.
Invented by my father in the forties when he was a student at Glasgow University, the hold is a boon when surrounded by braying office workers on payday.