Here it is! I worked on this first part of the photoediting workflow for a while, since I was stuck with university's tests lately... well, I rounded up all the things I had to say about my personal single-layer/adjustement tips. For those interested in more advance techiniques, I'll be working on them, I promise!
Anyway... this is just out of the editor, so there might be errors and other stuff I'll fix later. If you have any suggestions to enhance this tutorial or make it better, don't hesitate and tell me please!
Hope this one will be of some help to anyone!