Pack a laundry bag
Living out of a suitcase for a week, or longer, usually means you will have to bring home dirty clothes. Unless you’re on a long trip and have a laundry service in your hotel, you’ll need somewhere to store these clothes on your return trip. Throwing it all in one suitcase all mixed up just means you’ll have to wash everything when you get home.
Why not think ahead and bring a laundry bag with you in your case? You can pack a large mesh or canvas bag, that won’t take up too much space on the way out. Hang it on your door, throw in all your dirty laundry, and pop it in your case when you’re packing to go home.