1) Compressed air from an overhead, retractable reel. How the heck did I get through the early years without this? I leave my portable compressor hooked up via quick disconnect to a feed line for the overhead reel. I can disconnect and roll out quickly if I need the compressor in the yard, garage, or at a neighbor's. The reel also has a quick disconnect, stuffed with a blowgun when not using any other air tools. This setup is great for woodworking, but the air gets used for all kinds of other tasks, too.
2) Stopped overcrowding the shop with machines. For years, my semi-portable power tools were set up and ready to work. Visions of moving from station to station with effortless efficiency. I thought it made projects go faster. The opposite is true. As I run low on space, the shop gets messy and projects begin to crawl. Now I take out the miter saw, belt/disk sander, scroll saw, etc. only when needed. The rest of the time, I enjoy the free space around the bigger machines. The shop stays much cleaner.
3) Rolling tool chest. You know, the mechanic's type. Just a low end, stacking unit from Lowes. Measuring tools, wrenches, sockets, screwdrivers, drill bits, etc, stay organized and dust free, and I can wheel the thing around if needed. My pegboarding of all this stuff never stayed organized. Somehow, I manage to keep it neat in the rolling cabinet.
What are your best three easy imrpovements?