At the same time you should always check if what you're drawing makes sense, especially in anatomy (even if stylized) and perspective. Stuff like "do arms bend that way?", "is this really what it looks like if someone pulls their shoulder this way?", "are the eyes really in the right spot, or did I shift them because I misunderstood the perspective?". That helps even if you're drawing from reference; the original may have errors or you misunderstand what is depicted.
A nice trick is to look at a mirrored version of your drawing. Takes your brain out of the "yeah I did this" space and allows you to see it as something foreign, so you can notice errors.