Focus on market segments -- not the market as a whole -- to find opportunities, said Jim Cramer on his
"RealMoney" radio show Monday. If you sat out September because it's historically a "bad" month for the market, you missed the bull markets in oil, minerals, telecom and Google ( GOOG), said Cramer. And "you missed the easiest money that was made this year." Cramer advises: Don't make decisions based on the market. Make decisions based on the sector. If the sector is out of favor, ignore it. If the sector is in bull market mode, buy "best of breed" stocks. At times, you can even buy worst of breed if the sector is strong enough.