There is no job so simple that it cannot be done wrong. Nobody notices the big errors. Never be first. Never be last. Never volunteer for anything.
Opportunity always knocks at the least opportune moment.
Never invest in anything that eats. Never ask a barber if you need a haircut. Never ask a salesperson if it is a good price. Logic can never decide what is possible or impossible. If you don't care where you are, you ain't lost.