I'm here at UC Berkeley for Y Combinator's Startup School 2009, where the startup incubator has invited hundreds of entrepreneurs from around the country to listen to some of Silicon Valley's most accomplished founders and investors share their advice on building a new company. Sequoia Capital Partner Greg McAdoo just took the stage to talk about the current economic conditions, and how startups can actually thrive during them. Below are my paraphrased notes on what he said.During the last 12 months since the fall of Lehman, we have been more busy making investments. Made ~20 investments (Series A/Seed) in the last twelve months. Don't let the negative headlines get to you. If you look back at the headlines of the 70's (1975-78), there's quite a bit of bad news, but some of the biggest names (Apple, Atari) were founded then.