As the author of How to be a Financial Grownup, I am the original Financial Grownup. Right after college, I got my Certificate in Financial Planning so I would know enough to ask the right questions. Yeah, I’m that kind of person. I’ve been researching and dishing out advice for as long as I can remember. But now, I needed to give a little advice to myself.  How do I keep investing in a retirement fund after leaving corporate America? This week was the first week in my entire post-college working life that I did not contribute to a retirement fund. I’d recently left my job at Thomson Reuters, a place I’d worked for 16 years as an anchor and personal finance columnist. It was time – I was burned-out to a crisp. I’d run the numbers on what leaving would mean for my new self-employed lifestyle, and things would be fine financially. I had opportunities as part of the release of my book, several paid speaking engagements, offers for freelance writing and anchor/reporter fill-in …