Then look at what you're doing, try to understand what it is that you're doing wrong and fix it. Identify and quantify the process and use that as a catalyst for future work.
here's a hint.
On every model, edges are drawn between verts, and faces are drawn between edges. On a perfect model, every surface, curve and edge all form perfect orthogonal leading lines, as you can see in this model here
Each and every edge loop creates orthogonal leading lines that "shape" the stature and sillouette, echoing the end shape and flowing into the next, with no angle more then 30 degrees. This should theoretically tessellate perfectly from top to bottom, but that's just hypothetical, almost no model does that perfectly