[Dujon] I finish every shower by turning the water to cold, and measure the temperature. In winter it was 5ºC, and I could only manage about 40 seconds, but above 20º I can stand in it indefinitely. This is part of following the Wim Hof Method for improving cold resistance.
[KagomeShuko] Seconding the good wishes for the exams - what areas of theatre are you studying? I work in the industry (I design video for shows), and long ago did an MA in Theatre Studies at Glasgow Uni - can't say I was very academically successful but loved the industry enough to forge a career in it! :) (Twenty-five years on no one has *yet* noticed it's a forgery...)