[Peroni]

All solid advice.

I'd like to add to it with some absolute basics:

1. Avoid sounding scripted at all costs. I'm sure you'd be more comfortable practicing a certain pitch but a rehearsed script is obvious to everyone in the room. Sounding natural, confident and passionate is absolutely critical.

2. Stay honest. No product or service is perfect. Don't make excuses if someone attempts to pick holes in your product. Acknowledge it, thank them for the feedback and move on.

3. Be persistent. The hardest part of selling is picking yourself up and doing better the next time after being rejected over and over again.