Here is what I call the abandon-all-reason-and-do-it-now approach to your first run ever.
Explained simply, what you have to do is this: Abandon all reason and do it now.
Put down whatever you are holding, tell anyone in the immediate vicinity to hang on a second, walk calmly through the nearest exit, and when you hear the door close behind you, take off.

Source: tamparejuvenation.com