Thinking about “IF” can do both good and harm.
If you focus only on the past and keep thinking about IF, that’s regret. You should’ve done that, could’ve done that, or would’ve done that. But you didn’t. Thinking about these IFs won’t take you anywhere except the bottom of a deep hole you’ve dug for yourself.
If you focus on the future and keep thinking about IF, that’s simulation. If that happens, then you WILL do this. It’s a vital part of any planning process that you can’t ignore or neglect.
But there’s still one more thing to have: your strong WILL to make things happen. Thinking about IF can do good for you only when you have these two WILLs—things you will do and strong will—with you.