Join Taz Tally for an in-depth discussion in this video Using the exercise files, part of Photoshop Color Correction: Creative Mood Adjustments.
If you're a premium member of Lynda.com, you have access to the exercise files used throughout this title. You'll want to download these exercise files to your desktop, then all you need to do to access them is to just double click on the folder, and then look inside the exercise files folder. You'll see here that there are multiple exercise files and this is because we have multiple starting places in the exercise. The first one is the one called Gnarly Reflections. That's your first starting place. And then the sequentially labeled files, two, three, and four, the ones you'll access as you progress through your project.
If you are not a premium subscriber to lynda.com, you don't have access to the exercise files. But you can follow along from scratch, with your own assets.
Check out the first installment in this series, Photoshop Color Correction: Fundamentals, for more detailed information about adjusting color in Photoshop.