You have to have an idea of what you are going to do, but it should be a vague idea.
Every child is an artist. The problem is how to remain an artist once he grows up.
The older you get the stronger the wind gets - and it's always in your face.
Others have seen what is and asked why. I have seen what could be and asked why not.
Only put off until tomorrow what you are willing to die having left undone.
The more technique you have, the less you have to worry about it. The more technique there is, the less there is.