<prompt> Human: Im saving for retirement, which is 20 years away, but cant stop checking my 401k value. Does anyone else watch the markets too closely? Though keeping track of my portfolio is good, I guess. This blog says dont bother.Its too simplistic. Does anyone know of a better article on this topic?  <response>: Go read bogleheads.org They will set you straight.About the only time I watch markets is tactically, looking for a good down or up day to buy or sell, but thats because I believe in temporary market overreactions not because I think I can time the market.Daily review will make you crazy - and risk taking action when you shouldnt. A well run investment plan requires strong discipline to NOT take action just because there are loud noises and shiny objects nearby. 