Dammit Herb......I lost my train of thought again!!!!
Oh yea, garage must haves.
Good depth to the garage. No less than 28' deep.
A telephone.
Run some CAT Cable so you can have computer hookup.
Rig up some kind of two way call system to the house.
Set it up for a stereo and a TV. Saturday mornings in the garage while watching PowerBlock is great
A sturdy deep bench and a good vise as stated above. Make the bench no less than 30" deep. Make it strong enough that if you want to throw a transmission on top you can. And if you are going to be doing that, have a metal surface covering that area.
Heat. Whether in the floor or overhead.
Overhead cabinets. Preferably with a soffit above if you have tall ceilings. Any horizontal surface in a garage is a major dust collector no matter how clean you try to keep it.
Tall ceilings. At least 12' to plan for a hoist later on.
If possible, a bathroom, and running water. Waterproof sidewalls at least 3' if not 4'. If you want to wash out your garage, or wash your car, you don't want water splashing up on any surfaces like OSB or Drywall.
A drain in the floor if possible.
Water spigot in the garage where it is convenient. And if possible, have a small water heater or an instant water heater.
Back to your bench. Make it so that you don't have legs, or if you have toolboxes built into the bench or the bench made out of toolboxes as in Steevo's great setup, have them up on a concrete base, or have them closed off underneath so dirt, spiders, and parts don't roll underneath.
Lights and a lot of them.
Windows. Not only for fresh air, but also for light. If you are worried about thieves, then put sliders up towards the ceiling. Windows are also great for taking out fumes if working with the doors closed.
A storage closet with shelves. Like I said above, any horizontal surface catches dirt and dust. Have a closet with shelves so you can put the larger objects so they aren't setting around taking up floor space. Plus things will stay cleaner if not setting around inside the garage.
Plan out your saw cut lines in the floor. When your floor is poured it will settle some over the years. It may not settle much, but it will settle. Plan your control joints so that if or when it does settle, that the control joints come out to where your large door(s) edges are. This way, if you have any water dripping off of a vehicle, the control joint will be a barrier from water running where you don't want it to. If you have welding tanks, tool boxes, bench, or whatever, you don't want water running under them and creating rust. You get rust on your concrete, it doesn't come out.
Adequate outlets. Not only 110, but you also want your 220 for any potential machinery that you may get in the future, plus for a welder.
Outlets in the ceiling and outlets high up on the walls. You never know when you are going to get that one special neon light, and no where to plug it in without using an extension cord. I have outlets up in the ceiling in the corners and also up high on the walls in a few areas. It makes it handy for the lights. Neon lighting and a traffic light also makes a nice security light. Cockroaches hate lights and that all thieves are is cockroaches. That's why they only come out in the dark.
If your garage is going to be detached, and if you have windows, no windows to the neighbors side, but make sure you have windows on the side that faces your house. Not only will a light deter a thief, but a window also lets you see in if something is going on. From the house to the garage, you can shoot through a window.
If you are going to build a pole barn, and this is something to consider, not only for you, but for others as well, but if there is a hidden area of the pole building that a thief would be hidden from site, use safety screws to mount the metal. The reason I say this is that a friend of mine built a new building at his scrapyard. It was a large 75' x 150' building, partly behind solid fencing, and partly behind chain link fencing. He kept all of his premium scrap inside. The copper, aluminum, brass. One evening thieves unscrewed the metal siding, gained access, then used his towmotor to load up a large truck. The cops told him at the time that a few places had been hit by them unscrewing the metal siding.
If at all possible, do not build in a secluded area, but build where someone would not like the light, traffic, or neighbors if they would decide to try and break in.
That's just a few things off the top of my head that I can think of. I know that there is a ton of things that the other members will have too.
Looking forward to your build pics. Take a lot!!!