I have tried some day to night recipes with modest success. I think this would be a good topic for a Masters Academy lesson. Thinking the best way to: change exposure, color balance, manage shadows, turn on streetlights, add a realistic glow from a lit interior to windows etc.
Raw sharpening, creative sharpening, print and or web sharpening. A guide to what settings to use. What sharpening filter to use and why. How to prevent halos and the best way to get rid of if have halos. Sharpening using smart sharpening.
Cutting out subjects has seen a couple of new ideas recently. Cutting out a person in two stages. Head first then the rest of the body. Removing the background with the eraser tool. Any new ideas from Ben.