First off, I recommend self publishing. Here are a few good articles about why.
- Hugh Howey: Self-publishing is the future — and great for writers
- Hugh Howey calls for author earnings revolution
And here’s a recent report analyzing the Amazon revenue for various publishing approaches.
If you decide to self-publish, everything you need to know to get started is in this book.
- Self-Publishing Attack! The 5 Absolutely Unbreakable Laws for Creating Steady Income Publishing Your Own Books
If you decide to go traditional, there are hundreds of books and articles on the subject. Here’s a good one.
My path to getting traditionally published won’t help, because an editor called me when I wasn’t trying to get published.
As far as developing content going forward, find a compatible critique group. If you're in the Austin, TX area, this is a good one that meets on second and fourth Sundays from 1:30 to 3:30. We always welcome new members.