Great post, Robot. I'd add the following:

Not insisting on absolute cleanliness in the assembly. A small speck or rock hard grit can destroy a new bearing or a rotating assembly. Use lots of clean dry, lint free rags. Keep your tools clean and your hands clean. It's take a bit of time, but pays dividends in the build. Nothing like having your hand slip off an oily wrench and jamming your fingers or bunging your knuckles.

Building in low light - light is critical to be able to read precision instruments and measure correctly (more so as my eyes age). I have two double eight foot florescent fixtures and eight double four footers in a 22' x 30' garage and occasionally use some supplemental light.

Working on an engine when you're tired or angry - hopefully this needs no further explanation. It's okay to take our time. Remember that "the demands of the service or the importance of the job are never so great that we can not take time to do it right".

Regards All,
Glenn