Time to buy some tools

[shortshift]

You've probably noted that that Miata's have rather low ground clearance. Ergo ramps come in handy, as floor jacks can't always reach far enough. The Rhino ramps work well - they're lightweight and have a longer on-ramp segment. Craftsman "professional" series wrenches are very good. Deep-drive six-point sockets (3/8 inch drive) are essential.

[juxt3r]

Since cordless drills were mentioned...
I've found that the DeWalt 14.4V drills, at least the XRP versions, last just as long as the 18V drills, seem to exert just as much force, but they weigh less. If you're using one for an extended period of time, you'll definitely notice the difference.
One of my work buddies also has a couple of Makita drills, one of which is a multi-function unit. It is a basic drill, as well as a hammer drill and impact drill. I've never used it in an automotive setting, but it's definitely a handy item in construction.

[boisking]

Yes, they do. Most of the companys sell metric only sets, you just have to look.

As for your coment on 12 point sockets, I would have to disagree with you about round out over time, unless you are using them with an impact wrench. I even have 3 sets of 1/4" drive 12 point sockets, very hard to find, because we had 12 point nuts on aircraft. I find that SK makes a good set of sockets

Miatas are 6pt only. I have never rounded the inside of a 12pt socket, but have cracked many (using hand tools). Like I said, Craftsman tend to be brittle, rather than soft. All my broken sockets have been either cheapies or 12pt Craftsman (with the exception of using non-impact rated sockets with an impact tool). They always crack at the thinnest part of the socket wall.

In further detail to "Snap-On sockets round out instead of cracking", I have only ever seen one wear out so badly you couldn't use it. It was the most used socket in a ASE master-tech's box. It was about 22 years old. He got it replaced for free by the Snap-On driver. Chances are, any Snap-On tools you buy will outlast you.