Once a year, I might rebalance my asset allocation . . . and then it feels a bit funny to just step away for another 12 months. But yeah, it's comforting to know that if I traded more frequently, I'd be more likely to make things worse instead of better.
It's a much better time to be an investor. I'd hate to think what it would have been like to build a portfolio in the era before index funds, before low-cost brokerages, and under the "advice" of a smiling broker in a fancy office.