When the market gets shaky, I think it's important to do a few things, such as review your holdings and keep your future in mind. I also think it can help to look back at what some of the greatest investors had to say. This piece shares some wisdom from Peter Lynch, Benjamin Graham, and Shelby M.C. Davis. Overall, I think most of them are simply saying you have to look at investing over a long time horizon. Anything shorter is just noise.