What you must do, do cheerfully.
If someone offers you a breath mint, accept it.
Don't say you don't have enough time. You have exactly the same number of hours per day that were given to Helen Keller, Pasteur, Michaelangelo, Mother Teresa, Leonardo da Vinci, Thomas Jefferson, and Albert Einstein.
Love your work, then you will find pleasure in mastering it.
After you've work hard to get what you want, take the time to enjoy it.
Good manners sometimes means simply putting up with other people's bad manners.