My husband was in the Marines for 27 years so we moved, plus I had the work of getting 3 homes ready to sell, so here's what I did. Rented a storage unit then went through every room in the house. Had 3 lists - one of items to keep, but store; one to get rid of (Goodwill or trash, etc.); and one for items to keep. In closets, for example, only keep the clothes you need for this season (summer), the rest should be either stored (winter clothes) or discarded. Amazing how large your closets will look. Do the same with everything in your house. At the end of this "triage" your house will be completely uncluttered and look larger. When I got that done I took a notebook and went through every room and wrote down absolutely every step I had to take to get that room spotless. As I completed each task I checked it off against my list. It's a lot of work but I managed to sell all three houses in two weeks to a month, even in a downturn economy.
As for your sewing stuff, do the same and store everything you don't need. Keep back what you need for a project but keep your sewing area spotless. I did this and turns out that one of the buyers of our house was a sewer and was able to imagine her stuff in my sewing area. Hope this helps.