This document provides a list of useful keyboard shortcuts for Photoshop CC2015 organized by category including tools, selecting, viewing, layers, type, painting, pen tool/paths, and panels. Some key shortcuts include using V, M, L, W, C, I to switch between tools, Ctrl-Z for undo, Ctrl-Shift-T to reapply the last transformation, and F5-F8 to show/hide common panels like layers and color.