Focus on what you can do rather than stress about what you have no control over.
It's OK to be down in the dumps - just don't stay there too long.
You can't drive into the future if you are looking into a rear vision mirror.
Belief in ourself is like a muscle - it is strengthened by constant and careful use.
Remember that the six most expensive words in business are: 'We've always done it that way'
'I tried and it didn't work' is a lot better than, 'I wish I'd tried'.