Navy SEAL training is brutally demanding, involving waking soldiers up to gunfire on a Sunday and forcing them to exercise, jump in cold water, and go without sleep until Friday. Tuesday of Hell Week is considered the hardest part because soldiers are extremely tired by then, having had little sleep since Sunday, and are not even halfway through the grueling training. Many soldiers start feeling sorry for themselves and thinking about quitting on Tuesday. However, focusing just on completing each small task one at a time, without thinking about how far they still have to go, is an effective tactic for getting through Tuesday and weakening the perceived barriers that cause procrastination and laziness.