Do it like youre on the clock. I mean like an actual m****c. Do it all at once, dont stop until you packed absolutely everything and for 2 entire days live like you dont live there and have zero belongings. Do not clean until it's all out. When you unpack do the same. Get the bags and boxes empty and out and out of the rooms/house ASAP. Do not look at s**t, do not get nostalgic, do not invite chatty friends, do not invite family to help. Do it all as fast as possible.