I've been thinking of what to work on in my art and I've come up with a few ideas. Mainly:

Soft shading: How to make a proper gradient
Highlighting: Making actual highlights instead of merely two shading layers
Line weight: Controlling the size of my lines to produce an aesthetically pleasing result.
Backgrounds (low priority)

Got any other pointers or ideas of where I could improve? I'll add 'em to the list and