If you do not get carried away with your own genius when your stocks go up, or hang your head in despair when they do not, then you can make use of the long-term strategies like family wealth planning and tax management that are our stock in trade.
Better still, I was also sitting on some paper losses elsewhere. (You are, too, unless you are either out of the market or a genius.) I sold some stock mutual funds at a loss and immediately bought similar but not identical funds.