CSS optimization should be the last thing a developer does, if at all. Most of the time, it's not worth it. As a general rule, just be as concise as possible.

CSS optimization should be the last thing a developer does, if at all. Most of the time, it's not worth it. As a general rule, just be as concise as possible. `.nav ul.actions li a` could be turned into `.actions a` as long as it's alright for the .action anchor tags not in the .nav element to have the same style. But if you use .actions elsewhere and want the .actions list to look different in .nav, that's fine.