On a $250,000 mortgage at 6.5% interest amortized over 25 years the total interest paid will be almost $252,400 – that’s only interest!

You’ve essentially paid for two homes: one in principal and one in interest. Pre-paying one additional payment of $1600 each year would decrease your interest to $203,500. You could save nearly $49,000 in interest and have your mortgage paid off in 21 years just adding an extra payment each year. Have you ever used a mortgage calculator to see how you can meaningfully decrease your interest?

“Why would I need to diversify? I don’t need to diversify! I hold only as much stock as I can hold in one hand.”

While being over diversified can negatively impact returns, not being diversified at all can leave an investor exposed and vulnerable to unexpected events in one sector, industry, country or investment. Effective diversification is ensuring you have exposure to investments that behave differently in various market conditions and buffer your overall portfolio against extremes of volatility and risk.

“They don’t need profit…the company is going to the moon! I have to invest in this stock…just look at that chart!”

Trees never grow to the sky and the fundamentals of gravity dictate that what goes up must come down. Speculation has high rewards, but also a high potential for losses. Companies without profits are dangerous because they’re burning through more cash than they can generate and this eventually catches up to a company.

“Oh…that’s what that company does?”

Do you understand what you’re buying? Do you know what factors can influence changes within the market a company operates? Is there sustainable demand for products or services? Are their operations complex? Can you explain what they do in a single sentence? What are the risks?

“I can’t sell…there’s still potential…plus I’m only down 40%.”

Knowing when to buy is always easy; knowing when to sell can be painful and difficult to ascertain. Do you have a rule, guideline or minimum loss (percentage or dollar amount) that you can tolerate on your investments? How important is capital preservation to you? Do you have as much confidence in yourself to sell as you do to buy?