I'll be done with college next year, but I really don't want to go forward professionally in Economics. I don't have a formal CS education,, but I've gained some sort of gestalt by programming for a while and going through blog articles and following up on interesting things. I'd love to get into software development professionally, but I don't have a formal degree. What should I do?
Developers are hired for what they know not the certificates they have so make sure you learn the subjects.
As soon as you can, start interviewing for jobs. Even if you feel you are not ready. You need to understand the process and you might even get lucky with a job offer that will help you get the job you want. It will probably take you 1 to 2 years to get a job once you start your training.
Unless you have super self discipline don't try to do it on your own. You'll fall into a cycle of starting and not finishing. Also, talk to a career advisor to help you with resources. You need to define what you want, your goals. Don't go there thinking they will tell you what to do. Good luck.