It's never a bad idea to borrow an idea -- or two, or more -- from the world's most successful all-around stock picker.

Warren Buffett is stockpiling cash. His Berkshire Hathaway holding company continued to sell more than it bought in the third quarter when it offloaded a quarter of its stake in Apple, regulatory filings revealed Thursday.

Plenty of big-time investors have made a name for themselves over the years, but arguably none have become as big of a household name as Warren Buffett. Thanks to personal achievements and the success of his company,