Speaking from very recent experience (and believe me I could go on and on and on), it's such an enormous undertaking. I was wrecked after spending a week moving (albeit a week that ended with Tough Mudder, so that probably contributed). I have no clue how people move house in a day. I've already vowed to spend whatever money I need to to get someone to move for me next time - hopefully not for a good many years yet.
Best of luck. If you need packing boxes, we have heaps (these particular boxes helped a friend of ours move internationally, so they're sturdy enough to survive a shipping container)