This is a great tip. If your camera allows you to shoot in RAW format, then do it. It will take up more space on your memory card but your images won't be played with. JPEG sharpen the image, compress and add an artifact. Plus, you get more editing capabilities.
Also, not sure if this has been said but always make sure to use adjustment layers. Don't go Image->Adjustments... This will make your life easier down the road say you don't like how 2 adjustments clash, you can fine tune everything much easier. And keep a duplicate layer of the original image hidden under everything.
Just some stuff that's helped me along the way..![]()