Picked this up from a powerpoint presentation on Tom Peters website. This quote from Marcus Buckingham highlights several things for me
(1) never rest on your laurels
(2) one trick ponies are just that – one trick ponies
(3) think long-term

“Sustained success means making the greatest possible impact over the longest period of time”
        – Marcus Buckingham
           from his book “The One Thing You Need to Know“