Comments by John C.Bogle in his little book of Common Sense Investing

He echoed the words of Clifford S. Asness, managing principal of AQR Capital Management, "We basically know how to invest. A good analogy is to dieting and diet books. We all know how to lose weight and get in better shape: Eat less and exercise more ... that is simple --- but it is not easy. Investing is no different ... Some simple, but not easy, advice for good investing and financial planning in general includes: diversify widely ... keep costs low ... rebalance in a disciplined fashion ... spend less ... save more ... make less heroic assumptions about future returns ... when something sounds like a free lunch, assume it is not free unless very convincing arguments are made --- and then check again ... stop watching the stock markets ... work less on investing, not more.

John C. Bogle also want us to consider those thoughts from Benjamin Franklin, the master of common sense and simplicity, "If you would be wealthy, think of Saving as well as Getting ... Remember that time is money ... Beware of little Expenses; a small Leak will sink a great Ship ... There are no Gains, without Pains ... He that would catch Fish, must venture his Bait ... Great Estates may venture more, but little Boats should keep near shore ... This is easy to see, hard to foresee ... Industry, Perseverance, and Frugality make Fortune yield."