If you want to improve as an artist, there's only one way to do it. While there is certainly nothing wrong with going to see art exhibits, visiting an art museum, and taking art classes, the most important method of improvement is much simpler than all of those. It requires no travel, costs you no money, and does not require anything other than a graphite pencil or pen. Perhaps you have already guessed Mr. Heidt's #1 Rule: “Draw Every Day”. Keep a sketchbook handy. Share your sketches online, and ask your online friends their opinions.
Here are 5 Great Tips for keeping a sketchbook.