"This is your life and it's ending one minute at a time" was the quote used in a sequence depicting the mundane and pointless pursuit of Edward Norton's character - working as a recall coordinator for a major car company.
It can be very sobering to realize that every minute you spend on something - is a minute you will never get back. Certain things become less important, others - worth doing. The best part is that the problems you thought you were having can become insignificant and at times even funny.
Fight Club is an excellent Sunday movie because it makes you think about things like that. Worrying about something you need to do next week? Feel stressed out? It might be time to watch Fight Club.
Some things just don't matter.