Warren Buffett likes to say that the first rule of investing is "Don't lose money," and the second rule is, "Never forget the first rule." I too believe that avoiding loss should be the primary goal of every investor. This does not mean that investors should never incur the risk of any loss at all. Rather "don't lose money" means that over several years an investment portfolio should not be exposed to appreciable loss of principal.

Ultimately, nothing should be more important to investors than the ability to sleep soundly at night.

At Baupost, we constantly ask: 'What should we work on today?' We keep calling and talking. We keep gathering information. You never have perfect information. So you work, work and work. Sometimes we thumb through ValuLine. How you fill your inbox is very important.

My view is that an investor is better off knowing a lot about a few investments than knowing a little about each of a great many holdings. One's very best idea's are likely to generate higher returns for a given level of risk than one's hundredth or thousandth best idea.

Sometimes buying early on the way down looks like being wrong, but it isn't.

Excess capacity in people, machines, or property will be quickly absorbed.

When managers are afraid of redemptions, they get liquid. We all saw how many managers went from leveraged long in 2007 to huge net cash in 2008, when the right thing to do in terms of value would have been to do the opposite.