Pack a first night bag. Pajamas, clothes for the next day, toiletries, etc. Accept the fact that you might not do all your unpacking on night one, and you won’t want to be digging through every bag just to find your toothbrush!
Pack inside anything that you can. Fill up your laundry bin, trash can and even the mini fridge. You have to carry them in anyway, so you might as well fill the space with any odds and ends. Just make sure it’s not too heavy to carry!
Remove bulky packaging. Whether it’s a microwave box or school supplies packaging, you’re going to get rid of it anyway, so do it ahead of time to save some space.