Why should someone invest in your startup venture? What have had your venture achieved till date? How do you ensure the perceived value of your product outweigh the cost? There could be many such questions to brainstorm about, often overlooked by startup entrepreneurs.
There's hardly anyone who don't believe in greatness of their idea. However, you achieve greatness by not just believing, but by taking pragmatic decision. Have you validated your business idea? Have you given a thought to your business model? What areas of business have you planned so far?
The list of "To-Do" things could get much longer, before you decide to knock an investors' door. Do feel free to reach out to me for any further clarification that you may need.