I'll focus on the little things that had big returns...
Having multiple grinders, so not to waste time changing wheels -grinder, wire, flap, cutting, and abrasive pad...so nice :****:
I only have a 2 car garage, but one side is deep, and I utilized the back corner as a metalworking area, ordered up a heavy, extra long, vinyl curtain from amazon and made a rod to contain all my metal shavings and dust. I like a clean shop and I would spend so much time cleaning between shop time..it drove me nuts!