I would agree with most of what has been said - plan your sleep cycles and get some sleep during the day but if you ain't fit at 2300 - sh1tcan the idea of flying - if you have a prang and it transpires you weren't up to it, guess whose licence is in jeopardy? The company might find itself in hot water if they forced you to fly, however.
I would heartily recommend the following book
'FATIGUE IN AVIATION: A PILOT'S GUIDE TO STAYING AWAKE AT THE STICK'
JA and JL Caldwell
Ashgate
ISBN: 0754633004
Although, it covers a lot of stuff we should already know, it was recently reviewed/recommended by the RAeS and is well worth a read beacuse it involves recent research and USAF experiences in Afghanistan/Iraq.
IMHO, knowing what we know about fatigue and crews, the FAA rules on FTLs are shot through - even the CAA/JAA rules are pushing it, especially for the 2200-0600 hrs schedules. Make up your own minds once you have read the book.