We have moved more times than I care to count. All the above advice is right on and will help you get through it. The last move was for my parents and it was a real challenge. The only thing I would do is organize and donate first. Get rid of everything you don't want or need. That way if friends and family help with the packing they will know that what ever is in the house goes. It saves you the time of eliminating and explaining to everyone what to pack while you're doing it.
You will get through this and once you set up your new house it will feel amazing. I always loved the purging and the feeling of a newly organized and dejunked house!!
Good Luck!