I have learned to slow down which was hard for me. In a world where everything is rushed, it wasn't easy to put the brakes on. I still have to keep myself in check to see if I'm getting ahead of myself. I wonder if others have that problem.
Observation is key when drawing. You have to observe every detail and constantly ask yourself questions. Questions about value/lighting, shape, negative and positive spaces, etc. This is why as I've said you can not be rushed.
So, my celebration is drawing. I now do it regularly and see progress in the outcome and on my discipline.
