Was going to write what exactly what bananas said! We moved a few too many times so here are my top tips :)
In additon to bananas tip, also number the boxes and have a master list with a brief description of contents to stick on a cork board or cupboard door. That way, months later when you still haven't unpacked everything (!!!) you will know where to look for XYZ.
We have also travelled drawers without unpacking them as gummi suggests and it works really well for clothes etc.
Jute shopping bags are also awesome - easy to carry and versatile!
Especially if you are moving yourselves, use lots of smaller height boxes rather than all tall/ square ones. They are easier to lift and less daunting to unpack and can be shoved under a bed until you can unpack. Ideal for books, CDs, paperwork, knick knacks etc.
Keep certain things like ID, cheque books, utility bills etc safe and to hand so you can do the address changes more easily.
Write a list of all the addresses you need to change - and keep adding to it as there is always something like the library that is easy to forget. Some addreses can be changed early and this helps.
Mail forwarding is brilliant and will catch anything you haven't changed addresses on - then you can add the thing to the address list.
It is great that you get the keys early - I would do any painting or easy DIY before moving your stuff in.
Measure the space for applicances if you need new ones or have your own to take. Sometimes fridge spaces can be odd widths, and also washing machines tend to be bigger and taller these days so don't just assume that they will fit simply fit underneath a counter....And measure depth too ours just fits but does stick out a bit to avoid squashing the pipework but its worked out OK.
If moving a fridge/ freezer, don't forget to run down your food in the run up to the move as most appliances need to stand for a while before they can be turned back on (mainly if they have been tipped over for carrying/ transport but better safe than sorry IME). Its much easier if you dont have loads of stuff needing to be kept cold!
And don't even try to cook on moving day :)
Hope it all goes well OP. Packing up a bit everyday is great but if you have a system and a plan it can still go really well at the last minute - even if it does take forever!!