For example, I just learned today that an idea I had years ago for an airport valet service is now reality. Not only is it reality, but it is growing and grabbing funding.
The service is EXACTLY as I envisioned it would be.
I was reading a book about this topic a while ago by Elizabeth Gilbert. She describes how ideas are an energetic life-form looking for a human partner. If it thinks that you can do the job, it will pay you a visit. But, if it notices that you won't collaborate to the execution, it will find someone else. It will not wait for you forever.
Now I know that this is magical realism, but it always stuck with me in a way to remind me that if I don't take action, someone else will.