You don't have to be so vulnerable and tell your deepest secrets. A post could be just- why you did something in a painting or why you titled your painting "Imagine Further" for instance. It would tell a viewer just a little something extra about you that one painting might not...are you a poetic person? "I loved the movement of light and showed that with the marks I made, indicating the promise that would reveal itself if I focused on that certain spot..."
Are you an analytic person? I used complimentary colors, and red under the green to give it depth of field, etc.
Deep thinker? "I was thinking of John Lennon today... Several poems from Yoko Ono's 1964 book Grapefruit inspired Lennon to write the lyrics for "Imagine"—in particular, one which Capitol Records reproduced on the back cover of the original Imagine LP titled "Cloud Piece", reads: "Imagine the clouds dripping, dig a hole in your garden to put them in."
Or just say something funny, if that's you. You don't have to be super social-you can sit at the keyboard and socialize just a little here and there. And over the body of work and the little things you say here and there add up and before you know it, you are marketing AND making more friends.
You've done it already thru your posts here on Art Talk. We all know you just a bit better now!