More than 100 years ago, author Robert Louis Stevenson offered the following tips for maintaining a positive attitude. They still apply today.

• Make up your mind to be happy. Learn to find pleasure in simple things.
• Make the best of your circumstances. Everyone has problems.
• The trick is to make laughter outweigh the tears.
• You can't please everybody. Don't let criticism worry you.
• Don't let your neighbor set your standards. Be yourself.
• Don't borrow trouble. Imaginary burdens are harder to bear than the actual ones.
• Hate poisons the soul, so don't carry grudges. Avoid people who make you unhappy.
• Have many interests. If you can't travel, read about new places.
• Do what you can for those less fortunate than yourself.
• Keep busy at something. A busy person never has time to be unhappy.