Since I did mention that we can all learn from my mistakes, I'll share the first today :
1. Don't start painting early in the morning with cardboard protecting the grass. All those little bugs are happily jumping around in the morning dew and sunshine. Their little wings stick to the furniture you're attempting to paint using careful, even strokes.
There will be no photo of this mistake as all those bugs wings were promptly sanded off the first coat of paint.
Enjoy your day!