Well I'm sure you'll get a few other replies and advice, but the basics:
> Keep as much of the water as you can
> try not to disturb the sand
> sump?
1) Switch everything off and unplug it...
2) disconnect all lights, pumps, etc - remove what makes sens into boxes or directly to the new location
3) Fish out first into large containers with heaters (prob not necessary at this time of year) and something to move the water = filter / powerhead (breaking the surface) or air pump.
4) rocks out (prob ok to just keep them wet - I put mine in buckets with water).
... you can use the water out of the tank for all this
5) empty the rest of the water into large containers (that you will still be able to carry to the new location when full of water) - take out as much as possible - right down to the sand line...
6) now - with a friend or two you should be able to lift the tank and carry it to where you want it.
7) move the stand and sump
8) put the tank back on the stand - water - rocks
9) when happy - fish
how far you moving it?