The ultimate thing a person can do to help an artist is to make a purchase of the artists work. By making that purchase you are not only providing that artist with the financial means to continue making their art, but also better understanding you, their audience, and what things they are making really mean something to you too.
The next level of support is, following them on social media and letting them how you appreciate what they do, though likes and comments.
If you like please follow me on the social media platform of your choice Instagram, Twitter or Facebook and post a photo of the piece of mine that brings you the most joy, and tag me in it. Each month I will be choosing one post and sending that person a 40% discount code!