Great quote from an Art of the Title Sequence interview with Jim Capobianco on the end credits of Wall-E:
Always move.
Don't sit around waiting for approval or something to happen. I have found there is always something to do on your project. Even if it is the smallest thing it keeps the momentum going and momentum is everything. By always moving it gets you that much closer to getting the project done and you stay ahead of the people who feel it is there job to judge and can put a stop to what you are trying to say before you've had a chance to say it.
Like a shark keep moving or die.
How very true.