Lead By Example
There's an old saying that says, "The Fish Stinks From the Head". If you're the leader of a group/business/organization then you need to look no further than yourself to understand why your house is in the order that it's in. Those that you lead have a tendency to pick up on your habits (good or bad).
Remember that everything matters - what time you show up and leave. How you interact with your team. Your attitude, ethics, diligence, persistence, resilience... Your team is watching you and adjusting their behaviors based upon your actions. The rule of thumb is to lead by example. Want punctual team members? Then be punctual. Want a respectful team? Then be respectful. It's a simple, powerful and foundational principle that is easy to apply.