How to Make Your Drawings Darker

I'm sure there's other things that you see that people do over and over again. I've always wondered what was wrong but this is giving me some really deep insight into this common thing that I'm actually doing, says the artist. Yeah definitely there's one thing and it took me a while to do it myself it's something that I read a few years ago that I got from one of Andrew Loomis' books. Just add more contrast and don't be afraid to mess up the drawing to just experiment and grow and increase your process. Oh yeah definitely before I even read that I knew that I had to adding more contrast and I knew that i had to just make it darker