Everyone says they go the extra mile. Almost no one actually does. Most people who go there think, "Wait... no one else is here... why am I doing this?" and leave, never to return.
That's why the extra mile is such a lonely place. That's also why the extra mile is a place filled with opportunities.
Be early. Stay late. Make the extra phone call. Send the extra email. Do the extra research. Help a customer unload or unpack a shipment. Don't wait to be asked; offer. Don't just tell employees what to do--show them what to do and work beside them.
Every time you do something, think of one extra thing you can do--especially if other people aren't doing that one thing. Sure, it's hard.
But that's what will make you different.
And over time, that's what will make you incredibly successful.