One of the best tips I can give people is “move around your light”
Every time I show this very simple technique during workshops there is always a group of students that is literally totally surprised by the effects you can create by just moving around your model. What you are actually doing is the same as moving around your light source, but when you combine it with a wall against which the model is posing you can get some stunning effects very fast.

In this setup I’m using one strobe aimed at my model.
In the first shot you see it shot from the front.

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