When I've got the free time to do so, I often think about what it actually takes to retire a millionaire. The experience of millions of investors suggests that it's usually not one lucky trade; it's finding a few good stocks early in their existence and then letting them compound for years. The three stocks featured below represent the kinds of businesses investors should look for: profitable, evolving, and building platforms that could be much bigger in the next decade. Each of these stocks could add to a ...