"Crunch time" is not an unfamiliar phrase for academics. With deadline for grant proposals, meetings registration and abstract submissions, internal deadlines for completing projects, we always have a deadline of some sort. As a postdoc, you are directly or indirectly involved in meeting many of the deadlines. Enough has been said about how to manage your time and be a multi-tasker in order to become a hero during the crunch times. What I have found as important is the necessity of keeping a healthy mind and body during these times. I don't know what your particular hobby is, but I highly recommend against compromising them just because you are on a crunch time. If cooking is what makes a good distraction for your mind, never settle for a pizza to secure more time for your academic work.
Well... enough said!