Before I became “Phil Town, teacher of investing principles to more than 500,000 people a year,” I was a lot like you: someone who viewed individual stock investing as way too hard to do successfully. As a guy who barely made a living as a river guide, I considered the whole process pretty impenetrable, and I was convinced that to do it right you had to make it a full-time job. Me, I was more interested in having full-time fun. So I was tempted to do what you’re probably doing right now: letting some mutual fund manager worry about growing your nest egg. Let me tell you why that decision could one day make you absolutely miserable. The fact is, because of natural market cycles, the mutual fund industry is likely to soon be facing twenty years of flat returns. That means that if you’ve got your nest egg tucked away in funds—especially the type found in most 401ks—your egg won’t get much bigger than it is now. Translation: Get...