If "What If" questions spark ideas, "How" questions tease ideas into existence.
Gauri Nanda, inventor of the Clocky (Wikipedia), went from "What If" to "How" in a pretty impressive way.
Here's what Gauri Nanda asked:
What if it was harder to turn off the alarm clock? What if your alarm clock forced you to get out of bed and chase after it? What if I put wheels on it?
While testing Nanda noticed the clock's fall was traumatic... How might that shock be absorbed?
How do we gear up for production? How do we handle orders? How do we launch a full-fledged business?
The Clocky is still sold today. I may have just purchased it... and my future self will curse my present self for getting it.