Artists: Having a great portfolio and blogging about what you know is gold. However, I’ve heard of people selling art critiques and trying to charge for basic information. I’ve always made everything I write 100% free, and here’s why: If your blog is for people that have the time to do what you’re teaching\explaining, it’s awesome for them and if the info is good, you’ll gain respect. However, you’re also showcasing your talent to people that don’t have the time to do it themselves, but instead have the money to pay *you* to do it.
Speaking as an art mercenary, this is the crucial principle: Don’t try to make money off the people that are trying to learn so they can make money. Try to make money from the people that have money.