Common Errors in English Usage

Paul Brian, Emeritus Professor of English at Washington State University, has created a useful site listing common grammatical and usage mistakes. It deals with American usage primarily, of course, but he has been careful to note where British English practice differs (and, indeed, where it is preferable). I note that he takes a hard line on "could care less" and "couple" rather than "couple of", two common Americanisms that set my teeth on edge. Good fun for pedants everywhere.