The 85 Percent Solution: Getting started is more important than becoming an expert. - Ramit Sethi

The major turning point for me was when I got serious with my girlfriend. She made about a third of what I made, but she had about a year's salary saved up. I was ashamed to have $40,000 in debt, so I started applying the IWT principles to pay down debt and accomplished that inside two years.

To test for demand, just ask yourself, "Do a lot of people care about this?" If the answer is yes, then ask yourself, "Are people willing to pay a lot to solve this problem?" to figure out price. You'll quickly see where your different ideas fall on the chart.

There is power in saying no to the things we don't care about. But there is even more power in saying a big YES to the things we love.