Ask HN: advices for presenting a project

Hello,

I have been working on a project for quite some time now, and I have been struggling to get in touch with a big organization that could both help me kicking off my "startup" and receive good attention out of my project. After a lot of hunting I managed to find two contacts (the president and the secretary of the said organization). I am about to contact them to see if I can manage to convince them about my "baby" and I would hate to ruin everything because I badly planned the presentation.

Since many of you (and ycombinator) dealt with this all already, do you mind to share some advice and URI on this matter? I'd also love to improve my slideshow skills, any suggestion?

Thanks