Yeah, I hear you LM. I had an overnight flight in the summer and I was PNF for the return. I was micro sleeping all the way in on the approach. I had taken all reasonable steps to be rested before the flight. The problem was a physiological one. The previous 4 days had been very early starts. The 5th "day" was start work in the evening and by 3am I was as useful as a chocolate ashtray.
I can't make my body adjust like that. Yes, I could have called in sick, but I wasn't tired when I went to work, but about 6 hours later zzzzzz. It was a crewing responsibility. I did try and take a power nap about 2 hrs before the approach, but it didn't happen.
I know the thread has wandered from the flight safety side, but apart from the incident I've just mentioned, it's the drive home that worries me most, because usually adrenaline kicks in when I'm flying the important bits. In the car it's more difficult. Just ban overnight flights - we all hate them!!