Before school started I had the exciting/overwhelming experience of organizing my classroom.
One thing I found to be very useful was this shoe organizer that I found at Ocean State Job Lot for $6.
Paintbrush storage was an issue for me at my student teaching location and at a long term subbing gig I did. They were always in a lot of containers all over the sink counter or on shelves. This was a simple and cheap solution. Now the paint brushes are out of sight until they’re needed!