Plans get judged on whether they work, almost never on what they produce if they do. So success keeps arriving with a problem attached that nobody planned for: you make the team and now you have no free evenings, you get the job and now you need a ride at six in the morning. The problem is not the success, it is the surprise.

Take whatever you are most excited about and write the sentence that begins with and then you will have to. Solve a little of that now, while it is still hypothetical and cheap.