When you, and your partners if any, have all the core skills and industry knowledge you need to start right away without seeking experts, napkin notes may be enough to get going. Let's say you are already an expert in technology and social media. Then you, and your team, probably don't need a detailed plan to start developing a new app. You will draw on your knowledge and experience, and you understand that you might need to go back and do some more detailed and formal planning later. Certainly when you reach the point where you are looking for investors or lenders, you will move beyond those first casual notes. Until then, drawing upon your expertise can allow you to quickly jump into the market and perhaps gain a competitive edge by using a minimalist plan.
What's more important, sales or profit? Profit is what generates your salary. You could actually make more profit with less sales. Less sales could actually be less work. The most important thing for a business is to make money. That's profit. Now some might say, I don't care so much about making a lot of money. I like the freedom of owning a business. Well that is probably true, but if you don't watch your profit, you might lose that freedom. It's always amazed me how most businesses, even very large ones, talk about how much their sales are. You hear comments like, that's a บꯠꯠ company. But what's a บꯠꯠ company if it has no profit. Now I do admit that 2% net profit of บꯠꯠ is a lot bigger than 2% of ũꯠꯠ but most likely the large one carries a lot more headaches too.