“It’s time to unlearn a common myth about investing,” Jim Cramer told fans of his “Mad Money” TV show Monday. “The best way to invest is not to buy a bunch of stocks and just sit on them,” he said. Cramer explained the view that trading frequently costs too much is just false. He said commission have been very cheap for years and the taxes on gains is a good thing because it means you made money. Cramer criticized Wall Street Journal columnist Jason Zweig after he wrote an article this weekend that said buy and hold is solid investment strategy and took a shot at TV pundits who recommend trading in and out of stocks. Cramer explained that his strategy is to buy and do homework, not buy and hold. He reminded investors that buy and holders got slaughtered during the dot-com bust. Cramer took even more issue with Zweig’s statement that buying stocks down 50% is a good investment. He pointed out that investors who bought into National City (NCC), Washington Mutual (WM), General Motors (GM) Fannie Mae (FNM) and Freddie Mac (FRE) after they dropped 50% are now down even more. Cramer said that savvy investor should do one hour per week of homework on any stock they invest in - if they don’t have time than they should hand it off to a professional, and do their homework on the guy in running the fund. He told investors to remain involved in their portfolios. “The results are completely worth the effort,” he said. BioSolar (BSRC) could be the boost your portfolio is looking for! This emerging green solar producer is poised for huge gains in 2008. Read the free research report today