When they asked him about it years ago he said the return would go down dramatically as AUM went from 1M - 10M. I take that to mean to look at things that are too tiny even for a $10M fund. So look in small stuff, find something way out of line, and bet big, cause you're probably not gonna find them that often.
Look at the ethanex bankruptcy Thomas Braziel invested in, Norilsk Nickel arb at kiddynamite's blog, mexican restaurants (CASA) which was a regular long from oddballstocks blog a few years ago (actually just read the whole oddballstocks blog archive).