My wife was a nurse in a large hospital. She used to tell stories about mistakes or close calls that she had seen. I would think "a lot of industries tackled that issue years ago, by using checklists". One problem is the hospitals don't share a lot of information with each other, due to malpractice suits, so they can't learn from each others' mistakes. And like you said, egos can get in the way, too. They were also slow to adopt basic safety equipment like gloves and eye protection. After her second trip to the employee health department, she decided that wearing a face shield was better than catching an incurable disease from a patient.

Thanks to everyone for the responses. I was just wondering what other people used as a sanity check before sending a bike out the door. And even if I think I know what I am doing, someone else may have another way that I hadn't thought of. Like setting the brake lever body parallel to the downtube instead of using a straight edge off the handlebar drops. Who knew?