From the folks at Digital Photography School, some quick photoshop tools that might save you lots of time. They discuss:
1. Duplicating layer masks for other adjustment layers
2. Adding a curve adjustment layer with a difference
3. Dodge and burn
4. Layer comps
5. Stamp visible
6. The “place” command
7. Patch tool
8. CMD+T or Transform
9. CMD+T+Warp tool
10. Opening second window for the same document
Learn more about how they use these time saving tools here and share your favorite photoshop tips in the comments section below.