Saving long haul flights?

sometime in the near future I will have enough money to fork out 25 million or so down to lease a 747.  Now, I know that you can fly an aircraft a long way and land at various places for fuel and save your flight plan and come back to it later.

What do you long haul folks do when you have an 8 hour flight and can't sit at the computer that long?  I know many refuse to sim at a higher rate and also wouldn't want to save it.  I have read some just do chores and other things and let the AP fly the plane.  That may be fine for me on occasion, but most of the time I would rather just fly an hour or two and be able to save and come back later or the next day and fly a couple more hours. 

On some of my longer prop flights over Alaska I do use fast sim rate, usually X2 and X4 sometimes, but X8 is just too fast and looks like a film being fast forwarded.  If I could actually save the flight I could still actually spend the hours flying, I would just be splitting them up and that's what I would really like to do. I look forward to someday making flights from Anchorage to Japan or something, but I would like to know how you guys handle these type flights.

AH1 includes the facility to save a flight in progress, on the proviso that AH shuts down immediately afterwards, and when you restart, you go straight back into flying that flight.