All artists should keep a sketchbook and draw in it mercilessly, until the pages fall into dust and your finger becomes a pencil. I always have 3 or 4 on the go at once - for my ever-changing moods. I like to draw when I'm watching TV! Or waiting for a tardy friend in a public place. If you have a sketchbook, you still look friendless, but at least you're not bored.
Here are a couple of pages from the last month or so that you may enjoy. Or find awful.
I think the above page is good because it captures many of my preoccupations at once.
This page on the other hand is merely testimony to what I was watching at the time. Can you guess what it was? It wasn't terribly good.