I have a few tips.

When using a straight edge and an X-acto, always make sure about 1/8" of your finger is hanging over the straight edge so you can slice a nice hunk of flesh from you finger. Makes great graphics on your Monokote too!

When enlarging the prop openings in a plastic spinner, always look directly into the cone when blowing the chips out, (never turn it over and tap it on the table) that way you get to drive yourself 12 miles to the eye doctor to the have them removed. Great way to improve you one-eyed driving skills... and by the way, always make sure no one else is home when you try this.

Never test a new fuel tank for leaks before installing it into a new plane, the leaking tank causes soaking of the balsa and is a great lung and vocal box exercise. Always make sure you young children are in ear shot so they can learn from you experience.