Plenty! Let me list a few:

1. Wasting time by talking about your history, your products history or the company's history, or talking about how much you love this or that. The first words out of your mouth should be about what you have.

2. Spending the whole pitch selling the product but not the company. Investors only care about one thing, and that is whether an investment in your company will make them money. The product itself isn't as interesting as the company. Therefore, do not spend all your time telling us what a great product you have -- that's a sales pitch. Instead, tell us about how much money your company will make.

3. No experience in selling, and no plan for marketing.

4. The financials are bogus. Any one who thinks that the financials are just made up numbers anyway, so you can just throw up anything that looks good will not get any funding from any real investor. Make your financials as real as you can by having a CFO experienced in the industry.

5. Not making the "ask." Surprisingly, a lot of pitches forget to ask for money and how much they need, and fail to explain what that money is needed for.

6. Finally, do not ever say you are "passionate."