One mo' thang... as any pilot will tell you, it is desperately important to keep track of where you are. Tain't hard to do this at all, BTW. Easypeasy.

One MAJOR reason to keep track of where you are and how long you have been flying:

You can tell long before you reach the Point Of No Return whether you are gonna make it.

If you are NOT gonna make it, you are REQUIRED to turn around before the PONR. I fergit the FAR number on that one, but it is a no-brainer...