Just a few warm up exercises I read about here.
Connecting dots was definitely the hardest one for me, especially when connecting long lines from the bottom-up or left to right. Lines tend to curve, but I feel is better to hover over the paper for a little before throwing the line.
I had a little extra difficulty trying to make the cat go away, she kept chasing the pencil.
Hatchings were a pain to keep evenly spaced.
Ellipses were the most fun, still need a lot of work though.