JUST DO IT.

If you don't think you have the time to make a film, Director Steven Soderbergh just shot a completely improved film in his spare time, while directing a play in Australia.

The lesson?  Think big, remove all the obstacles (as in:  I have no money, I only have a Flip camera, I only have a day, I'll never finish the script), think big, and just do it. You'll be amazed at what you can do.