My investment portfolio is my main source of income; therefore, I classify myself as a full time individual investor. Investing is my third career. My first career, immediately after graduation from the University of Delaware, was a military officer and Vietnam veteran. During my service years I earned a Master's in Systems Engineering. After leaving active duty, I founded a software company as my second career and became an entrepreneur for 27 years until selling my business to a public company (a former competitor), becoming an executive in that company and one of its top three shareholders. During my 9 years with the public tech company, which spanned the 2001 tech bubble collapse, I sold my concentrated holdings in the company and diversified my portfolio, which was not an easy task as an insider in a thinly traded Micro Cap company. I also earned my PhD in Business Administration during the last four years of my time with the company, after transitioning from the executive role to an inside consulting and product design role. Finally, as my third career I became an investor focusing my full attention on management of my portfolio, rather than running a business, and I have been able to double my income during the period of the financial crisis of the past few years. I consider myself an income stream investor (as described by Irving Fisher in 1906), that is, the only reason to own an investment asset, whether it is stock in a company or commercial real estate, is for the income stream. I track the cost yield and the current market price yield of my 40 positions in a spreadsheet. When the current market yield on any position falls below 5%, I start looking for a higher yield position to buy as a replacement. My median holding period is 15-24 months, but I held MO for about 10 years before selling it last year. This simple income stream strategy has resulted in my portfolio currently being well above its Oct 2007 high without any new contributions, and after taking out all my distributions for living expenses, while the S&P 500 did not exceed its Oct 2007 high until 2014. As of the start of 2015 more than 75% of my portfolio positions are closed end funds (CEFs) yielding around 7% (total income / total capital for investment including cash).