Making references

No.5796524 ViewReplyOriginalReport
Been redirected here from another board.
Anyone can provideo me some guidelines/tuts/course/tips/tricks or whatever on creating references for your characters, like pic related.
I don't know if I suck, but I mostly find stuff on designing the characters instead of advices on making the references so the whole thing is coherent enough to be physically acurate in 3D.