I can tell you, what I am trying to do, can't guarantee it's the best way, as I feel like I am not done with it to the amount that I can give a final judgement.
Step 1, I try to focus on simplyfied geometric forms when drawing from reference (over for example fluid dynamic lines or beautiful shapes, or exaggerated poses). I am almost more drawing a posable artist's mascot than a human being, except that on overweight people I also add paunch, breasts or massive thighs as independent "masses", if they are voluminous enough to decisively influence the outline of the body.
Step 2, When I am done with my daily practice, I chose one or two poses, that I like most
Step 3, I try to draw the same pose, but from a different angle. like 90° turned to the left or right, or turned up or down by 45°. I am keeping the OG for comparison, to make sure, that I keep the size and relations identical.
From experience I feel, like this taxes my perspective thinking quite a lot. I think I get the benefit of drawing from reference that way, namely avoiding to settle down on a small range of same-y poses, but I also get the challenge of drawing from "imagination", in that I have to develop a really distinctive concept of the underlying foundation.
The goal is to learn to be able to manipulate a reference, to make it fit my artistic vision.
ATM the time and energy it takes me to "manipulate" a reference in this way feels like 5 to 7 times higher, than straight up drawing it. I hope that practicing this will lower the difference a lot, until manipulating a reference feels natural.
Once I feel satisfied with my practice in this regard, I'll have to check out, whether this solves my problems, or whether I will have to come up with an idea to deepdive more into physiology in regards to human range of motions and body mechanics.