Okay, grab one of them there trusty paper sacks and head for your dressers.
Put into it all the clothes you don't wear anymore because they don't quite fit, are worn out, are the wrong color, etc.
This is a really good exercise for the day when you really really need to do laundry. What have you still not chosen to wear even when the choices are limited?
You may find that you have a whole category of clothes which is heavily slanted toward the bag; buy new ones that aren't bad. You deserve non-holey socks and non-stretched-out or stained undershirts and underwear that has functional elastic.