Hire a van that can be collected one place dropped in another.
Plenty of cardboard boxes, if things are being stored I'd buy proper moving boxes online. Big roll of bubble wrap or paper to wrap breakables in, plenty of tape.
Make sure each box is labeled clearly what room it's for and what's in it, I tend to write something on every side of the box so that if they're stacked when stored you can still see them.
Laundry bags from b and m are ace for all clothes, bedding etc. If you need to make beds where you're staying make a bed roll of sheet duvet and pillow so it's easy to make the bed at the other end (do this as soon as you arrive so that you know you can get straight into bed when you want)
Pick a room to store your packed boxes, it's easier if rooms are emptied and makes it clearer for you to see your making progress.
Keep the kettle, loo roll, teaspoons etc to pack last so you can make whatever refreshments you need easily.
Keep your car and house keys somewhere where they will not get packed in a last minute panic.
Blankets/quilts can be used to wrap tellys etc.
Photograph your property and metres when leaving so that any complaints from the new owner can be quelled easily.
You will feel like you'll never do it