oddball,
Oh you're gonna Love that Dremel! there are soooo many bits to choose from.
It is my "go to" tool hanging front & center on my workbench pegboard.

-eye protection.. good wraparound, scratch resistant coating helps. Cuz stuff gets flung around Fast! i use racquetball goggles w/ elastic band when hanging upside & griding stuff.

-get all the combo bit packs with lots of different bits.. try each bit in the same material.. that's the best way to see cutting characteristics of each bit.. see what kinda lines/patterns they leave behind, etc.

-vary the rpm cutting speed too.. handy for different types of material.

-practice on your crappy knives/guns first to get the hang of it.
(someday i'll tell about the time i accidentally made my 1911 .45 go full auto! <img src="/ubbthreads/images/graemlins/crazy.gif" alt="" />)

-In the beginning you prolly want to clamp workpiece in a vice so you can use 2 hands on Dremel, to get a feel for when it wants to kickback, or pull sideways, etc. Once you get the hang of it you can hold workpiece in one hand, and grind/cut with other hand.

-I made an "adapter" out of wood for clamping my Dremel in my Vice.. making a stationary grinder/cutter. I find it's handier than my bench grinder for small work.. can change bits.