Puppies can cause sleep deprivation. Ours has been pretty good at this but is getting better. I am still up once at around 3 AM for a 'pee break' with him.
So when I am a bit 'snarly' I get out the notebook and take a zentangle break. I had found a great website, www.watercolor-painting-tips.com where Mary Ann Boysen demonstrated watercolor glazing. It is so much fun, and the results are beautiful. I just wish I was an artist and could really capitalize on these pretty designs. But I am not so I just tangle away on them and the colors shine through. Have a look at her website. It is fun and easy.