Pay attention to the unit economic model. The lifetime value of a customer ($9.95 in your case) minus the cost to a acquire a ew customer. This requires you to show an investor how you can use the money to acquire new customers via ads, cold calling, PR, etc.
Market size is important. Can you make a rational guess as to who will buy your product and how many potential buyers there are?
Delegate. If any part of your job can more effectively be done buy a junior person, do that. As a single founder, it will help if you show you are capable if this.
Cash is king. Good people will join you for cheap if you can sell the upside for them, but they rarely do quality work for free. 5,000 bucks can go a long way!
Do you have an unfair competitive advantage? What makes it hard to copy what you do?
Take advice only from successful people who understand why they were successful. What sounds like a good idea and what actually works are often different. In my case, you might use some of my ideas in this comment, but you want to validate them yourself.
Talk to your customers. That's a frikkin' gold mine of information.
Learn to stop working when it isn't working. Try it, fail, stop, step back and look for an easier way or different way.
One book I found useful is the Art of the Start by Guy Kawasaki. Pitching Hacks buy the guys at Venture Hacks is a good read, too.