It depends how much you have.
Put the mattress on the floor for the first night (if backs will cope). Put shower gel etc and towels in box and put straight in the bathroom so at least you can have a shower in the morning.
Label boxes by what room you want them in, not where they came from, but also put a description of the contents on it.
Clear out the rubbish, be ruthless. Do not let anything you don't want into your new home escape the bin. Beware...it's sneaky 
How many trips are you anticipating? If more than one, get all the bulky items in first. Even if not, try and unload them first. Nothing worse than tired arms and that sideboard still to move in...
Next get the high value and fragile items in, then you don't feel as worried if you really don't finish unloading before dark.
Dont forget to put the phone chargers in your 'first box' or handbag.
Speaking of the first box, put cold drinks in too, bonus points if you can keep them cold. And biscuits / snacks.