Doing your homework before meeting an investor improves possibilities for investments. Every investor is human. Investing in startup is more an art than science. There are no formulas or algorithm. Decisions are driven by gut once they hear the startup pitch. The purpose of every meetings is to say enough to get the investor to want to take a next meeting with you. It should say something insightful, or be intriguing to the investor so that they are drawn in and want to know more.
There is no scientific study on below list or it's a comprehensive list nor it's foolproof list. It is through my personal journey and experience.