Have you invested on skill development? What kind of skill did you acquire through your investment? Well, I have invested a lot of money to build skills from creative writing and online writing to SEO, Graphic Designing, and Web designing. If you are not earning well, or if want to grow in your career, you should certainly consider investing ion skill development. Once you've learned new skills, you can use it to generate income. You might easily recover your investment with a couple of sales. It's worth the investment in the long run.