Important phenomena: tone (black/white), composition, directions/references, movement, rhythm, warm/cold, artist's characteristic touch, colour, texture, transitions, quantity, quality.
Think about these and what you want to do with them when you create something.
Shape is that what you consider to be a unit in tone and/or colour.
Try to focus on just one thing at a time.
Try to avoid lines in a painting, because they're often a result of what you understand, not what you see.
Compare a certain part/shape with lots of other parts/shapes. Use the aspects.
Use an egg timer to avoid 'fixing' things. There's a reason you've placed that colo