I just picked up a Hypertherm 30 Plasma cutter because the price was right ($600 like new) off craigslist.
In the past, to cut metal, I relied on my bandsaw. That required a lot of muscling around of larger pieces and a mess when the coolant ran down the sides.
I've picked up the tip of using a wood piece as a guide to cut straight.
Any other tips/uses that you can share?