This will be a personal matter, depend­ing on whether it will be helpful for finishing or sharpening. However, it is a good idea to look beyond your current use of this space to the next owner. Would it be beneficial to add plumbing hookups so that the shop could someday be an apart­ment, or an art studio, or an extension to your house? It could add to the resale value of your house to be able to create as flexible an area as possible by roughing in a bathroom and even a kitchenette area if you can. If this is done when wall cavities are open or before the slab is poured, your forethought could pay dividends but not cost much up front. 
In this video Dave Heller shares a detailed tutorial on making fancy London-style dovetails with a mitered corner. The London-style dovetail originated in, well, London where cabinetmakers sought to show off their joinery skills by cutting the finest pins possible. Adding a miter to dovetails is very useful for wrapping a dovetailed skirt around a tool chest, or for adding embellishment to a cupboard's carcass. In the very near future I'll be releasing the last video,
Perhaps the most satisfying move I made was to automate the dust collection system. I used the iVACPro system to link all machines to the dust collector. When I turn on any machine in the shop, the dust collector fires up and whisks the dust into the bin. The system also has a programmable delay to allow the dust to make it to the bin before the dust collector shuts down. I set my system for a five-second delay. The system works flawlessly for my band saw, planer, and router table at 115 volts, and also my table saw and jointer at 240 volts. 
I agree with all of these tips in a larger shop. In a smaller shop (mine is just under 400-square feet) most things are fairly close together anyway. One of my original principals for shop layout was … how is a machining process performed on a piece of wood? Is the wood stationary while it is machined … or does the wood move through the machine? If the wood is stationary, I have tried to have this set for one side wall of the shop. To be specific, I have four machines in one line with a continuous table to support long pieces that might need cutting from one or all of those machines. The machines in that line are (from left to right) the drill press, the powered miter saw, the square-chisel mortiser and the radial arm saw.
Often times at first glance a board looks straight and the fact that it is actually bowed or has some warping isn’t always obvious. So the trick to knowing for sure, is to hold the board up towards your face, with the other end on the ground, and look at it at a downward angle (as shown in the below photo). This method will allow you to see if it is bowing at all.
In each case, we shuffled the bench, jointer, table saw, and band saw across to the top of the stairs, and then tied a rope around each to act as a safety while sliding the machines down the strapping on the stairs. Yeah, the table saw hit the wall, and the promise of a good mud and paint job saved my bacon. The rope worked well, and we were able to get everything down the stairs nice and slowly with­out any major issues.
Because of my son’s disability and my need to teach him just about everything, I have items sorted into bins with handles, labeled with the category (i.e, Sanding, Cutting, Measuring, etc). It’s over-simplified and over-organized, but necessary in our case. One thing nice about it is that we never waste time looking for something; everything has its place.
Pocket screw joinery is a system—employing special drill and driver bits—used to join boards or pieces of plywood to one another. Installing pocket screws involves using a jig to drill a sharply angled, 15-degree hole through the back of one board, then driving a special screw through that hole into the second board to draw them tightly together. Learn how to use pocket screws here. It’s often used in cabinetmaking and furniture building. Here’s how to build cabinets with pocket screws. The term “pocket” comes from the design of the hole which contains an upper “pocket” for the head of the screw to push against; this pocket also hides the head of the screw.

Let’s be clear about one thing: No workshop is perfect for everyone. If there were, I could simply give you a precise plan to follow with clear dimensions. Every person who comes to the hobby, avocation, or profession of woodworking has his own particular collection of tools and his own peculiar work style, skills, and desires for the kind of woodworking he wants to do that gives him a unique approach as to how he will lay out a shop: where the tools should go, where lumber and supplies are stored, and how much bench area he needs.