Top 10 Term Sheet Hacks (Naval Ravikant, VentureHacks)
My points to emphasize from his slides would be that getting leverage is key to your valuation. If you don't have more than two horse in the race, you might be at the mercy of the one venture capitalist interested in your deal.
Another great point is that "valuation is temporary and control is forever." You might have to give on this mantra in the latter rounds.
Anyway, check out their detailed "Venture Hacks: The Cheat Sheet" post, which is a solid overview for any startup entrepreneur.