First build: what lessons did you learn?

[In The Ten Ring]

My truck build (rebuild) is getting to the point I can be reasonably sure she'll run this summer. I have begun to reflect on mistakes I made.

1). Buy lots more paint of the same mix. I only bought enough so the painter couple spray what he was working on. I probably should have bought a lot more, so the next painter could spray the rest of the truck so she'd match.

2). Research better deals for replacement parts. I likely overpaid a few times.

3). Minor things: misplaced tools that had to be replaced, etc.

What did you guys learn for next time?