I like this article from MarketWatch that presents five investing rules that don't work. You may have heard these investing clichés before, but clichés come a dime a dozen:

Subtract your age from 100 to determine the percentage of your investment that should be in stocks. This would present an overly conservative portfolio for most people. Perhaps if the factor were higher, like 140 as the article suggests. Unfortunately, that would equire my portfolio to be 111 percent in equities. If I could do that, I could easily say I were the Best. Investor. Ever.

Set aside 10 percent of your gross income for savings. Again, this is too conservative. I started with 10 percent when I began working at my current company a few years ago, but I found it was quite simple to expand this amount. Since then, my rent has gone from nothing to $400 to $1,000 (but is now back at $900 or so). It's hard to pick one percentage and make it work for everyone.

Divide your total earnings into thirds where one third covers living expenses, one covers taxes, and the last covers savings. This seems a little more reasonable but once again, the rule won't work for everyone, especially extremely high or extremely low earners.

Put 5 percent of your money in gold. This is the first time I've heard this one. The article says that this is one rule you don't hear very often during bull markets. The article warns that the current market situation makes this a bad rule to start following now.

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