I agree that something to store things in would be very helpful to you. There is room under the ironing surface and cutting board. Getting things out of the way so you can sew is very helpful. I have some big clear plastic bins that I keep fabric in. I like them clear so I can see what's in them and keeping stuff in bins keeps the dust off it.
Your thread racks are great and I see you have some shelves on the wall. How about another set of shelves?
The hardest part is actually getting started. Once you start, it will all fall into place. {{{{{hugs}}}}}