Read and re-read and then print out and frame this poster's words, it's solid gold:

"Find a customer with his hair on fire..."

You can't just follow a whimsical idea you "think" might be relevant. You want to find a market where people are hurting. Imagine someone with their credit card out of their wallet tapping it against their screen, frustrated that they can't find someone to give their money to.

Sell stuff to that person. I've been that person about a half-dozen times this week. Your challenge is to figure out how you can determine what I was searching for. (Or what the masses were searching for.)

> "I've been that person about a half-dozen times this week."

Easier still is to just notice when you are that person and then solve that problem. Whenever I find myself frustrated with something, that tends to be the most interesting (and possibly lucrative) idea.

If your own hair is on fire, then chances are someone else on the internet is suffering from the same affliction, and is willing to pay you for solving it.

Solving your own problem is much easier than trying to guess what someone else's problems are, and you are more likely to stick with it since you can be your own user.