A handy hint: you can impress your friends by taping the BBC TV Quiz show "Mastermind", and memorising all the correct answers. Then, when they come round, play the recording back, but don't tell them it's a recording, just act as if it's on TV now for the first time.

Then watch their faces as you correctly beat all the contestants to the right answers, and make smart remarks such as "Fancy not knowing that - this is supposed to be his specialist subject, the idiot", etc.