I will start from the end of this point. Before each photo I do a quick visualization, I imagine what photo he wants to see on the screen and cut! It all happens quickly and subconsciously. Although, sometimes, when I only have time for it, I think about individual staff for a longer time.
I always have to know the stylizations before each planned session (unless I invent it myself). Similarly with the place, the atmosphere and the nature of the photographs to crown the session. In addition, I choose the poses and staff I can do in my head. Before the study session, I often draw sample settings. Thanks to this, the session runs very smoothly and according to the assumptions.
It makes work much easier and the results are much better. Of course, not everything can be planned. Almost always new ideas are created during the session, which are also implemented.
Good staff is a difficult matter. There will always be those who say you screwed up. Do not listen to them if the comments are soaked with hatred and cheekiness. However, when a person who takes clearly better pictures than you and has an idea about what he is saying is nothing prevents you from hearing what he has to say.
Returning to the heart, a good frame is not only interesting light, good model setting, climate and perfectly matched parameters. Strong points of the image, the rule of three divisions, the golden ratio. Does that tell you something? If so, great, if not catch up as soon as possible.
The right arrangement of elements in the frame is an absolute basis. In this way, you can consciously influence and manipulate the recipient. You can give him this hidden, mental message: "look here first, then there and finally at the end."
By placing a given element of the frame in strong points of the image, this is how you act on the recipient. You make him focus on this element. For portraits, in strong points it is best to place the eyes of the photographed person or, in the case of wider frames, the whole person.
The basic problem for beginners is placing the main subject of the photo in the center of the frame. They think it is "cool". Unfortunately.
Of course there are exceptions to this rule. Sometimes the central composition looks good if, for example, symmetry is maintained.
Of course, there are those who add their own theories to their gniots, say that they consciously break the rules or simply say the sacramental "it was supposed to be". If the picture does not defend itself and is not on fantastic their theories can ... keep for themselves.
Don't break the rules if you don't know them. Do not write your own theories and do not say that great artists over the hundreds of years must be wrong. Compose consciously with rules. Yes, try new things but be critical of yourself.