Old Towels & Linens - You will probably get some new things anyway, so throw out the worn towels and linens. *Tip--use to pack some of your stuff, then throw them out when you unpack.
Unused Appliances - Ditch the unused items. Do not donate or give away especially if they are old.
Unworn Clothes - As you go through closets, get rid of items you haven't worn or seldom do. Donate to the Salvation Army, Goodwill or some other local charity that can use them.
Duplicates & Souvenirs - You don't need more than one of the same thing, and take a picture of some of your souvenirs to keep the memory, then toss.
Cosmetics & Toiletries - Now is a good time to get rid of the open, semi used products that you have had lying around for a while. They can make a mess when you move and they might not be good anymore anyway depending on how long you have had them.
Cords & Cables - If they don't belong to something that you are using right now and are just stored from items in the past, dump them.
Paperwork - Purge your files of old paperwork you no longer need and to make things even easier, digitize the ones you do so that you don't wind up with a pile of papers you don't need in the future.
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Music: It Just Makes Me Happy by Dj Quads