It's OK to be down in the dumps - just don't stay there too long.
Focus on what you can do rather than stress about what you have no control over.
Remember that the six most expensive words in business are: 'We've always done it that way'
If you find a path with no obstacles, it likely leads nowhere.
The law of attraction is feeble without the law of action.
Pick yourself up when you're feeling down. No one else is likely to.