I manage mine and my mother's investments, which is pretty easy given my strategy. For years, I paid brokers 3-5% to advise on stocks and funds. The investments were always measured against "the market" - some did good in the short term, but none "beat the market" in the long term once you factored in funding fees and expense ratios (there's a reason nobody has ever one Buffet's challenge). Then, I was hit with an epiphany - if the measure of performance is always "the market," why not just invest in the market. So, a few years ago, I moved all of our money into the Vanguard S&P 500 ETF (VOO); it has zero funding fees and nearly zero (currently at .03%) expense ratio. With the funding fee and expense ratio, I'm already more than 5% ahead of where'd I'd be with more traditional investing.
I disregard the conventional risk strategy of diversification for two reasons: 1) the various investment sectors are incredibly interdependent these days - one goes down, they pretty much all go down; 2) the S&P has never been down over any 10 year period.