I was using Spotlight on OS X to find my Zen Desktop Cleaner app when "The Zen of Making" showed up. I forgot all about it, but I'm glad I came across it again.
Adapted from a talk by Massimo Banzi, co-founder of Arduino, presented at World Maker Faire 2011 in New York.
1. Don't make something you don't use yourself.
2. Know who you are making it for.
3. Know what you want out of it.
4. Make projects, not platforms.
5. Respect the intelligence of the beginner.
6. Experts are not the best advisors when you want to make tools for beginners.
7. If nobody complains you're doing something wrong.
8. Including people is hard (but necessary)
9. Good hardware, good software, good explanations, and generous users make a great project
10. If you're not prepared to have someone adapt, improve, clone, or trash your work, don't share it.
11. Open source software doesn't necessarily translate into a business model… open source hardware must.
12. Expect resistance… and conspiracy theories.
13. Don't let the fact that you don't know what you're doing stop you.