Sometimes you sit down to sketch or jot down some ideas, and the very first few lines you put to the page just aren’t right. You know they aren’t right, and they’ll hinder what you’re trying to do.
It’s okay to crumple up the paper and toss it. Start over. Paper is cheap! Being chained to bad ideas is very costly.
This is true of just about everything in life. Very few mistakes are so costly that you should chain yourself to them because you can’t afford to try again.
The Opportunity Machine 