http://theoak.com/rick/Electricity_in_the_Shop.html

Probably more than you want to know at present, but keep track of the url
because most of it will eventually come in handy in a shop at some point.

That's pretty good stuff. My only comment is about sub panels.
You DO put in the extra grounding bus (usually purchased separately)
and DO NOT install the green bonding screw if this is a sub panel in the same
building as the main ... no exceptions. Ground and neutral must be separate.
You will be bringing over a 4 wire feeder 2 phases, an insulated white neutral
and a ground. The ground bus attaches directly to the enclosure. There will be
tapped holes for this.

There are conditions in a sub panel in a separate building where you can
reground the neutral and pull a 3 wire feeder but that is still not the usual
way to do it.