You can go wrong by being too skeptical as readily as by being too trusting.
Never try to outstubborn a cat.
Small change can often be found under seat cushions.
People will buy anything that's "one to a customer".
When the law is against you, argue the facts. When the facts are against you, argue the law. When both are against you, call the other party names.
The usefulness of a meeting is in inverse proportion to the attendance.
If you have always done it that way, it is probably wrong.
A person who smiles when things go wrong has thought of someone to blame it on.
To get a loan, you must first prove you don't need it.
Machines should work. People should think.