I have been sketching for many years now. But a common misstep I do is the sizing of my drawings. Especially when I’m drawing people. Its a lot easier when I have the photo in front of me, but to do it from memory or to just create a fictional character, its more difficult to draw it properly. Therefore, I tried just practicing more with a photo or that person in front of me; just so I can get the sense of how faces and bodies are generally shaped, and build up to drawing without a reference. Overall, for sizing different aspects of the sketch, I now try drawing circles of the shape as a guide when I’m sketching.