Use the pen to the selections with alt or ctrl combo, everything seems cut with scissors. It also uses pieces of good quality, long known as a shell? It is not difficult, just take anything on top 1600px and when not blurred zoom or shell, is not difficult. In short, if you focus to select for good, to understand what image is of good quality and what is not, and do not put blurred parts you will make great strides. The idea, however, is good for my tastes.