(Success Magazine) — Here is a question that has kept many a new entrepreneur awake in the wee hours of the morning: How do you know if you have a good idea? You may think it is great, but truthfully, that counts for little. You will only be a success if other people not only think it is great, but are actually willing to plop down their cash to buy that great thing you want to sell. And of course a problem is that we entrepreneurs tend to be so passionate about what it is we do, we think all of our ideas are great ones (or if not all, then at least most!) While that sort of confidence can be a huge benefit, if it turns into hubris – and it can – it becomes a big detriment.