My first app was released in July or August of 2008. It was a 'fingermill' - a treadmill for your fingers. My level of programming was quite basic to begin with, so it was more gimmicky to start with. Day one it was up there, I had 79 pounds worth of revenue.
The 80
20 Principle, like the truth, can make you free. You can work less. At the same time, you can earn more and enjoy more. The only price is that you need to do some serious 80
20 thinking.