Synchronize your watch was always the first thing to do in Mission Impossible or the other Spy shows on television before starting the mission. As I sit here blogging, there are at least three clocks I can see from my chair and each of the clocks is off by a minute.
Some people purposely set a watch or a clock (like the one next to the bed) five minutes early. The thought is - the earlier displayed time will provide contingency for getting to your next destination 5 minutes early. Unfortunately the mind knows this and before long this is factored into the equation. So the next solution would be set it 10 minutes early and so on.
Just think - once you've incremented by 24 hours you could gain a day. Sort of like being on China time :)