Steve wrote to say, "I have a degree in teaching, and I've taken classes in a professional writing program… but I feel stuck between two careers. What do I do?"
If you're trying to make it as a writer, you've got an uphill climb. But so does everybody who wants to make a living with art. Making a living in the arts (ANY art) is hard. Here's an example I've used several times: I'm a pretty good ballroom dancer. (Really. Publishers love it when I come to their publishing balls, since there will be 300 authors and 6 guys who know how to dance.) I took lessons, was in dance classes, and hoofed it in musical theater. If you saw me on the dance floor at the Harlequin ball, you might think I was head and shoulders above most beginners. But I realize there's a huge gap between being pretty good at the local dance club and asking people to pay $80 to come watch me dance in a show on Broadway. There's a gap between being "pretty good" and being "a professional."
My son is a good guitar player, but there's quite a leap from playing in a garage band and asking people to plunk down $18 for your latest CD at Wal-mart. My daughter Molly could act and was in the plays in school — but there's a big gap between "being pretty good in the high school comedy" and "asking people to come see me at an equity theater." All of us who grew up in churches have heard really good singers over the years… but there's a big gap between the woman who is pretty good with a solo in the Christmas concert and the professional singer who has been granted a record contract.
Therefore, what do you do? You work at it. You get better. You study the craft. You take classes. You join a critique group. You locate a writing mentor. You pay a professional editor to review your work. More than anything, you sit your butt in a chair and write a lot. Because nobody gets good by "thinking about" writing — you get good by actually writing a lot. (The same holds true with all those other arts I mentioned earlier.) Most novelists don't get their first book published — they write several novels before hitting on a story that's salable, and having the writing chops to be able to tell it well. I used to teach writing courses in Taylor University's excellent Professional Writing Program, and I was surprised to find so few older or non-traditional students in the classes. Most everyone in my classes was in the 18-to-22 year range — which is fine, since I loved the students, and enjoyed teaching them. But I would have loved to see more returning students who were trying to move forward in their careers, and who had enough life experience to bring depth to their writing.
I'm sure you're familiar with Malcolm Gladwell's "10,000 Hour Rule," in which he argues that certain people (Bill Gates, Steve Jobs, the Beatles, Robert Oppenheimer, etc) became great at what they did because they invested 10,000 hours in their roles. Basing his theory on a study by Anders Ericsson, Gladwell offers a theory as to why some people become "great" in their roles. It's fascinating stuff, and I think he makes a very compelling argument for writers (if you're interested, download a copy of the book, Outliers, published by Little-Brown). But his basic argument is that a person needs TIME AT THE CRAFT to become really good.
So back to your question, Steve… what to do? I think it depends on your passion, your motivation, your calling, and your innate ability. Some people need to teach full time and write when they can. Others need to teach part time and write part time. Still others write full time and maybe do some fill-in teaching as needed. I don't know your situation, so I'm not going to offer any career advice… other than to say, "What do YOU think you should be doing with your life?"