In re-reading “A Random Walk Down Wall Street,” I am reminded of the basics of how to succeed as a long-term, buy-and-hold index fund investor. These basics could be summarized as follows: It’s not a flashy formula, but it has worked for millions of people. Let’s take each item one at a time: Save a good portion of your income. Like much of the financial literature, Malkiel makes the all-too-important point that if you don’t save, you don’t have anything to invest: Without a regular savings program, it doesn’t matter…