When I can, I par boil my potatoes the day before and dry them off in the fridge. I find this is makes them both quicker on the day and crispier as they're drier.
Also +1 for the goose fat.
Put your roasting tray on the hob, assuming its fire proof and you have gas, this will keep the temperature up of the oil which helps prevent your tatties sticking to the tray.
I think it does. Else you have to roast for longer at a lower temperature (or the edges burn)??
Nobody else roll theirs in flour between the boiling and the roasting? I do that and it's tasty.