You're more or less in the right place, but considering that the forum is read by many who don't speak English natively, it would be more appropriate to write in "real" English.
Personally, I copy the photos to the computer, then delete those that I see are hopeless. Out of focus, blurred in other ways, mistakes like pictures of the ground etc.
Of those worth keeping I select those I need for printing or publishing on the net or whatever it is. With those I really use, I do whatever I feel is necessary to make them as good as possible. Often that's the same as cropping, but sometimes more extensive editing is necessary. Photos taken of something I didn't anticipate happening are often more in need of editing, since they aren't that well planned.