What, I thought, is going to come in handy on St Patrick's Day? Of course, a beermat! So here's a shamrock beermat, built on the work of various CCbySA licencing artists.

Print. Put beer glass on top. Empty beer glass. Get new, full beer glass. Repeat until the wall you are leaning against is carpeted and the other side of the room has fluorescent lighting and smoke alarms on it. (You have fallen off your barstool.)