Empty Nest is challenging, but when you get a space for sewing, it makes it easier. Some of my favorite things for my sewing space:
Command Hooks on the back of my sewing room door for holding my rulers.
Sewing room painted light blue, with white trim, and white furniture. Very soothing place to spend many hours!
25 cubicle storage system from IKEA that is wonderful for storing fabric, thread, patterns, books. Table tops and drawer systems...