To keep your sock and underwear drawer from looking like this, you absolutely must have some kind of dividers. There are many different dividers to choose from.
I really like the spring loaded dividers. It is a little bit more expensive option but I just really like how I can space them exactly the size I need.
For your sock drawer simply roll your socks up so they are neat and together. Separate black and blue socks as far away from each other as possible so they don't get mixed up. Having a space created for each color or type of sock will make it easier to put things away and to keep things organized.
I used Simple Solutions sock dividers for this drawer. There are so many different brands and different kinds of dividers. You could also easily just use something you already have at home. You just want to use something to help divide your drawers. It not only divides “like” things together, but it also helps to hold things in place
These are "Whitmore Organizers" that I found on Amazon. The are perfect not only for socks but for underwear and bras.
I know a lot of us get overwhelmed with our messes and clutter. You may not even know where to begin. Just start with one drawer at a time! Clean out just one drawer today. You will be so happy that you'll want to do one more drawer tomorrow! Just remember to get rid of anything you no longer use as you are tackling this project. Have fun!