I like a good homily, bromide, bit of received wisdom, whatever. Useful for passing on to less wise colleagues or the feckless youth. I am particularly fond of:
If a deal looks too good that’s probably because it is…
The best argument against democracy is a 5 minute chat with the average voter
Penny wise pound foolish (especially when buying fun but non-essential items)
What are yours? Are there times when you have ruefully muttered something, but too late?
Let’s pass on our collective wisdom.