I've been in this situation before and it's depressing. If you're a problem solver and need problems to keep you motivated, my advice is to try and help people

I've been in this situation before and it's depressing. If you're a problem solver and need problems to keep you motivated, my advice is to try and help people on StackOverflow, forums, lists, etc. Research their problem and provide solutions. Maybe blog post about something interesting. That way you're learning, solving problems and have something to show. You could also start contributing to some open source project with tech support, docs and other administrative work while you learn Rails too.