Common sense is the knack of seeing things as they are, and doing things as they ought to be done.
Don't have any more secrets than you can keep yourself.
Most men had rather say a smart thing than do a good one. John P. Kotter, Leading Change.
When the truth is in your way, you are on the wrong road.
Method is the arithmetic of success.
A puppy plays with every pup he meets, but an old dog has few associates.