If you could pinpoint one thing that you learned on Fluther that made your life easier, what was it?

I was thinking about all the things I have asked here over the years and realized that the advice and information I have gotten here has often helped me a lot.

For instance, I had a locked antique cupboard and wanted to get a key made. I could not find any way to do it because of the age of the piece. But a flutherite came through with a fantastic source!
I was able to get a key made and the cabinet is as functional as it is beautiful.

How about you guys? What have you learned here that helped you out?