I like to note down interesting things and sayings as they happen and keep them up my sleeve for training and any other occasions that comes up. Here are a couple, anyone got any of their own they can add.
You can fool the spectators but not the players.
If you think training is expensive, check out the cost of ignorance!
Don't ever develop a plan that is so smart you cant explain it to those who have to carry it out.
If you aren't dressed to play, stay in the stand and off the field.
etc. etc