Don't act rashly or hastily; that will only get you in trouble. But when you have a great idea - pursue it now. Take concrete and committed action steps.
Start writing the book, don't just think about it.
Call for the audition, just pick up the phone and call.
Go talk to the person who offered you the job.
Get the team together and tell them your idea.
Set some extreme goals that will push you into new levels of thinking.
Most people do way too much "thinking about it" and not nearly enough action. The universe rewards those who act boldly and with faith. Security and safety are illusory and greatly overrated.
Act boldly in spite of any fear. You may think it easy for the rich to be bold, yet they acted with boldness and faith first, and then the wealth flowed.