The document provides tips on using selection tools in Photoshop, including geometric, freehand, edge-based, and color-based selection tools. It also discusses using history and snapshots to compare changes, blending modes like multiply and screen to darken or lighten images, and adjustment layers to make non-destructive edits. The tips are organized into multiple sections covering selections, history, blending modes, erasing vs masking, downloading brushes, and common adjustment layers.