I agree, start packing early and carefully. Pack the stuff you won't immediately need first and label it. Anything that you will need when you first move in (some clothes, toiletries, underwear, a couple of plates and glasses) pack in a separate box and mark it clearly. That way you won't be digging around like crazy when you first move in.
Also, take care of all the utility hookups beforehand.
Preparation is key. I have moved states a couple times, and while it was stressful, the more prepared I was the easier it wound up being. Enlist the help of family and friends and hire a mover if you can. Also, have PRN's handy and make sure you eat and sleep normally.