A garage is a special place -- the inner sanctum of the motorhead, the car aficionado.
It is not a place to be taken lightly. Many of us seek homes solely on the basis of garage space. True story: When I went looking for my first house, I told the realtor the ideal place would be a three-car garage with a loft apartment; of course I ended up with something more conventional, a normal single family house with a two-car garage. But my heart was in the right place.
Of course, getting a garage is only the beginning. Once you've cinched the deal, you've got to make it ready - by which I mean logically arranged, free of clutter, safe, and pleasant to work in. Begin by thoroughly cleaning the place out (if it's an older home you've bought, this will be the biggest job). Remove all old boxes and whatever accumulated garbage has stacked up.
Use Clorox bleach mixed with warm water (half-half in a bucket) to scrub the concrete and get rid of dirt and oil/grease stains and to prepare the surface for a treat that you will agree is neat. By this I mean a coating of Thompsons' Garage Floor Paint/Sealer - available in shades of light and dark grey (light grey looks best in my opinion). This stuff is wonderful. First, it protects the underlying concrete, sealing out moisture that could, in time, lead to cracks. Second, it leaves a surface that resists stains (such as spilled oil) and makes clean-ups easy. Finally, it gives your garage a bright, "professional" appearance that will please you - and add value to your home in the event you ever move. The stuff comes in gallon cans just like regular paint and is applied with a roller brush. You'll need three or four cans (about $35-$40 bucks at Home Depot) to do an average two-car garage. Application is a snap - from start to finish about two hours.
Make sure the surface is totally dry and free of loose dirt. For best results, lay down a top coat, then, after that has had a chance to dry, use a small foam brush to get the corners and edging. When that's dry (let it sit overnight), follow up with a final top coat and allow to dry for 24 hours.
You now have the foundation for a truly impressive garage.
Abnormals, read on
Normal people (e.g., those who let others work on their cars) are pretty much done at this point. They can park the cars inside, close the door and get back to the TV. As for the rest of us - well, the journey has just begun.
I favor old kitchen cabinets and countertops as the easiest to get, least expensive and "homiest" basis for in-garage workshop storage. If you remodel your inside kitchen, save the old stuff and you'll have everything you need. That's one way. Another is to get these pieces from a neighbor who is remodeling; at a yard sale, etc. These cabinets can be mounted on one wall and are a great place to store tools. Countertops make for great workbenches. And best of all, most of this stuff is my favorite price - free!
You'll also want to improve the lighting in your garage. Usually, the contractor/builder leaves two sockets for 100-watt bulbs and that's it, baby.
But at Sears and similar stores you'll find easy-to-install workshop-type lights that will be just what the witch doctor ordered. There are "track" systems that allow you to move the light source around, and stationary fixtures with tubular phosphorescent bulbs that provide diffuse (e.g., non-glare) illumination that will give you enough light for all except close-up chores. For these, you can use smaller, portable shop-lights or even a flashlight.
For winter climes, a small space heater is highly recommended. These either work using electricity or propane. With propane (and kerosene) heaters, make sure you are extra careful and have adequate ventilation. The basic concept here is to maintain "liveable" temperatures in winter - about 50 degrees. Anything below that will require gloves and heavy clothes to keep you from being uncomfortable - and those items will make it hard to do any kind of work because they are bulky and limit movement (especially of your fingers).
Another nice thing to have in the garage is an old stereo or TV to keep you company. Most people still have non-digital, 70s-era receivers that are just the ticket for this kind of duty. A pair of cheap speakers, some wire, and you're in business.
But most important of all is a sink (or at least a water source of some type). You'll need this to wash up and clean off the worst part of the grunge you'll be covered in after spending a few hours underneath your four-wheeled friend. Nothing alienates a significant other more than tracking used motor oil onto the carpet - or leaving a thick film of slime in the kitchen or bathroom sink. Even if it's just a hose connected to an outside faucet, make use of it. The ideal thing is to have a plumber come out and install a utility sink in the garage itself. As a rule, this isn't very expensive (a few hundred bucks, on average) and that's mostly for the sink. There are usually water lines already in the walls, so it's just a matter of tapping into these. Get hot and cold water if possible, because the warm water will greatly ease cleaning up, especially as it gets colder. (You may have to turn off the garage water in winter to avoid freezing pipes, etc).
These are just the basics, naturally. But they'll give you some food for thought and hopefully get you pointed in the right direction towards the ultimate garage.