My number one tip when organizing your bedroom is that everything needs a proper place. Whether that means baskets, storage bins, countertop catchalls, etc., just throwing an item somewhere will create unnecessary chaos.
Use your space wisely. If you have drawers on your bedside table, you can use those for smaller items like socks. And don't forget about the back of your doors and under your bed as storage space.
Another pain point in bedroom closets is often shoes - getting those off the floor is key to organization! Grab some shoe organizer bins to tackle that area. Plus they can be repurposed under the kitchen sink if you don't love them in the closet.