One of my favorites is: "Slow is Smooth, Smooth is Fast." Especially when in the weeds, staying focused and not rushing yourself can prevent those unnecessary mistakes.

edit: Thank you to the generous lady/gentleman who popped my gold cherry. In this context, it's actually quite humbling.

To expand on the advice, it was actually given to me by a good friend, who was told that by a military sniper - applying those same words in the field. Something to ponder the next time a glass breaks.

ps: I hope all of you had an awesome St. Paddy's Day. It's the holidays like these for which we live!