The faster you realise the above, the better your life will be. We have people that hold their ideas so close to their hearts, afraid that someone will steal it, that they become unnecessarily paranoid thus not really achieving anything. The true successes are from those that realise early on that ideas are cheap, and what matters most is execution.
A brilliant idea takes no time to form but if it is left there alone to wilter away, or even poorly executed, it will never translate to a brilliant product or service. So the next time a spark of brilliance ignite in your mind, make a conscious decision. Execute it, or not.