One has to make a buy,sell or hold decision daily if one checks the stock price daily. If so, then sooner or later one will sell out of great stocks. Best to check the quotes infrequently. Say once a year if you have to write an annual report,like Buffett. Or once a month,say the last sunday morning of each month. so one has till monday morning to quieten the emotional highs and lows. Like in the Indian Movie ‘Three Idiots’: Dil Pagal Hai ( the mind is an emotional idiot) Pyaar se ushe samjha lo( Quieten it with love) by saying Al izz well, All izz well…..on that sunday. This does not improve things,but gets the emotion under control, so one can think clearly.