Note to those reading this thread. Gombos' claim that that fuel
mismanagement is the leading cause of GA accidents is not supported by
the data. See for example

http://209.85.165.104/search?q=cache...lnk&cd=2&gl=us

The analysis within this document may help your safety related
decision making. Safe flying takes more than assuring yourselves that
you're not attempting a 4 hour flight on 3 hours 55 minutes of fuel.