I had started a big reply but its too late at night to finish it. In short build up. tops of closets are often wasted space. Measure the top shelf of each closet and build a duplicate of it about a foot higher and move all those hats and gloves and stuff up. then put your most important gear there and you have now emptied some space. Same with the garage, build shelves up. In the bottoms of closets get those shoe organizers and little pull out drawers. I've managed to consolidate each person's personal gear to their closet so then the garage and shed are all the shared stuff.