My tips as despite being organised to the back teeth, each time I have moved (and only ever moved out one day, put stuff into storage then moved into new house a few weeks later) I have found it extremely stressful as everything is done to such a tight timescale.
If you can, move some of the boxes/light furniture so that you leave a couple of rooms nearly empty. Then clean these rooms - then, on the day as they empty each room, follow behind them and clean it. do windows and paintwork over the next couple of days so you just have hoovering and dusting to finish off
Dismantle any beds and sleep on the floor on the mattresses for a couple of nights to save stress and swearing on the day. Same with any wardrobes or other furniture to be dismantled.
Clean bathrooms, shower rooms etc the night before. Remember to clean the loo the removals people use before you leave the house.
Check your sales contract to see when you have to be out of your house - some are 12 noon, some are 1pm, some are 11am!
Delegate making cups of tea for the removals people to your DH or other helper or get him to clean whilst you do the tea! Or enlist the help of a willing parent/friend/guardian angel to help the cleaning
Check how you have to hand over your keys and collect the ones to your new house - this can save untold hours of sitting in traffic jams making stressed phone calls to estate agents and solicitors!
Have an open box ready for people to chuck those last minute "oh I forgot to pack those" items into. If you don't do it the removals people will
. You will NEVER pack everything before they get there!!! you WILL still be packing those last minute bits as they drive up!
Keep you kettle, coffee, teabags, milk, gin, wine and mugs handy so you can make a cuppa as soon as you get to your new house. Keep bedding in an easy to reach box, clearly labelled and make the kids beds up .
Cant think of anything else -