Start as soon as possible. Go through everything, discarding or donating the things you no longer need or want. You don’t want to move things you don’t need!
Label packed boxes clearly with the items that are inside and the room the items belong in. This way, at the other end, the boxes can be placed in the correct room before unpacking.
Finally, make lists of all the utilities you need to cancel and start up in the new place.
P.S.: Keep a list handy of the things you need to do. It’s amazing how a simple chore like checking the attic or basement carefully will fall by the wayside.
I work for a large retail chain store. Among the many conveniences provided to our customers, we have a number of trash receptacles in our parking lot. These are meant to be used for trash, such as coffee and soft-drink cups, etc. But many customers have taken to using them to dispose of their household garbage. This causes the trash cans to fill up faster than we can empty them. Please let your readers know that dumping household garbage in public trash cans is a big no-no!