Pretty straight-forwards really. 1) Put it in your non-writing hand (so you can still write, duh), and grip it between thumb, first and second finger...
Step 2: Materials and tools
In short, use what you have. You could make a simple undroppable with nothing more than a piece of metal, hacksaw and sandpaper. Here's what I used:
1) Segment of metal with a thread at one end. You could use a lathe, and a die to add this thread, or drill a hole, tap it, and use a bolt.
3) Bench grinder
5) 45 minutes overall.