This pile is likely made up of three categories: dishes, papers, and miscellaneous items. Your miscellaneous items are, in all likelihood, things you don’t really need and might not even want to keep. You put them in this pile, not the “keep” pile, right? Make it a goal to trash at least one-third of these items.
Take a seat on the floor and take a look at each of your papers. Much of this is probably trash as well. Things that you need to keep, such as notebooks, homework assignments, warranty information, and more, can be set up on your desk (which should be cleared by now). The rest is probably unnecessary.
Dishes, dirty or otherwise, should be set aside in a sink or in a bin so that they can be addressed properly. If you have access to a sink in your dorm room, now would be a good time to clean up and put away your dishes.
In the end, you’ll probably trash about 50% of this pile.