Make your password strong, with a unique jumble of letters, numbers and punctuation marks. But memorize it — never write it down. And, oh yes, change it every few months... Yes, that's it? Or not?
"Keeping a keylogger off your machine is about a trillion times more important than the strength of any one of your passwords,” says Cormac Herley, a principal researcher at Microsoft Research who specializes in security-related topics.