A penny saved is a penny to squander.
A man is known by the company that he organizes.
A bad workman quarrels with the man who calls him that.
A bird in the hand is worth what it will bring.
Better late than before anybody has invited you.
Example is better than following it.
Half a loaf is better than a whole one if there is much else.
Think twice before you speak to a friend in need.
What is worth doing is worth the trouble of asking somebody to do it.
Least said is soonest disavowed.
He laughs best who laughs least.
Speak of the Devil and he will hear about it.
Of two evils choose to be the least.
Strike while your employer has a big contract.
Where there's a will there's a won't.
2007 Update: A piece of evidence that while wisdom is native to the elderly, folly is eternal. A fruit that ripened in the first garden which modernity cans for spread.
If time were a cloth to be stitched with delay,
And a penny in a pocket didn't rust or decay
And misfortune avoided those seeking self-help
And good fences raised properly my neighbor's whelp
Then we'd lay down our weapons and let slip our tools
And stare all day at the aged as leaders, not fools.