I have never suffered from jet lag, I treat my long haul trips like I do a late night out.
If I know I am going to be out late, I will get an afternoon nanna-nap, that will then allow me to stay awake past my usual 9:30pm bedtime. On a long haul flight, (in Y ) I endeavour to get at least 3 nanna-naps, so by the time I arrive at LAX my body clock is already pushed past its usual sleep pattern. Yes, I get an early night (say 8pm) first night in, but from then on - no sleep problems at all. Even on return legs, I am back at work the very next day.
Co-workers have had to have days off just to re-coup from long haul flights, guess everyone has their own body clocks, just deptends on how easy you can get your own to adjust.