I encountered a great quote recently while listening to Business at the Speed of Thought by Bill Gates. It really hit home with me:
"We always overestimate the change that will occur in the next two years and underestimate the change that will occur in the next ten. Don't let yourself be lulled into inaction."
Of course, the definition of "inaction" is up for grabs. Perhaps complacency would have been a more appropriate word. Action is great, but sufficient action is another thing altogether.