nd the man who did'st steal my pig be.... RIGHT THERE! Ready for a laugh, you look to your left but see no one. Hey wait a minute, that finger is pointing at ME. And now everyone is looking at you too. You open your mouth and... "Thine pig?! Not two fortnights prior dids't I loan to thee my prize'd bristly boar Gerald to service thy pink Petunia! You be a forgetfull old hen indeed." Whew, good thing your mind was running and ready.
Back at RPFN, someone once told me about how they clear out of those nagging 20th Century thoughts by taking a few minutes of a sort of meditation in the morning after breakfast but before the gate opens. Some Guilds do group morning exercises; some stretching is a great way to start the day.
Stand loosely and (stay with me here) envision a connection from your head, down through your body, and out the feet into the earth. The idea is to picture a vortex, a sink, and allow the various distracting thoughts of bills, the DMV, and other worldly nonsense to one by one be acknowledged and set adrift into the abyss. Sometimes this involves a bit of soul searching to even recall what exactly is nagging you. Once the annoyances are addressed, one by one bring up the characteristics which make up your faire character. Remind yourself about who you are: my name is William, I was born in September of 1555, and so on. Then tell yourself that you're about to open your eyes on another beautiful day. It is very Marin, but the memories of opening my eyes to the sun through the oaks stays with me still!
A great list of improv games online at improvencyclopedia.org. Check out the mindbending Impro from Keith Johnstone. 'Sound & Fury' swear by Gary Izzo's The Art of Play.