Good bosses say "thank you" to their workers often and with real sincerity, writes Art Petty. Expressing gratitude for a job well done is a quick way to motivate your team and show them that you're aware of their hard work, Petty explains. "Saying 'thank you' is one of the simplest forms of showing respect and one of the most powerful forms of letting your team members know that you are watching and that you genuinely care," he writes.