Just like the title says what should you of done sooner in your shop?
I personally have 2
Out feed table for my table saw. Makes it so much easier and safer to work with. All and all a couple 2x4's and a sheet of plywood a box of screws. If you have the space it is defiantly worth it.
and 2
Running receptacles around the shop where they were needed. For the longest time I was using an extension cord. So much easier then having to drag a cord over every time you want to use something new. Also a safety plus.