I have 3 but would LOVE to hear more…
You can always have more but you can’t have less
This one’s from my dad and it really stuck with me. You can, and really should, apply this to any intoxicant.
On the pitch is off the streets
This is about getting restless kids, or kids who might be in a bad situation, into sports.
The axe forgets but the tree remembers
Translation on this one: People who cause hurt are less likely to remember than those it affected.
The purpose of a system is what it does. Or The wizards 5th rule: Mind people’s actions over words.
When someone tells you who they are, believe them.
And last: Trust your gut.
Edit bonus after reading others responses;
Don’t let perfection get in the way of good enough.