People go crazy in their 40s. It's high school all over again because of social media. Unfortunately, this spending creates a lot of debt. I went the other way and became a saver and investor. Now, I am retiring at age 42 and will not need to work again. Oh yeah, my wife is doing the same. How did we accomplish this feat? In one word-income. The more income you create, the better retirement you can build. Your 40s are about becoming...