Whiners usually play alone.
Don't say "The last one there is a rotten egg": unless you're absolutely sure there's a slow kid behind you.
It's easier to knock on a door that's not shut all the way.
Ten minutes is short if it's a recess and long if it's a punishment.
If you want to zoom down the expert slope tomorrow, you have to fall down the bunny slope today.
Every piece of the puzzle that doesn't fit gets you closer to the answer.