Continuing my discussion on popular science fiction books, Sci-Fi Lists maintains a list of the Top 100 Sci-Fi Books, Short Stories, Films, and TV Shows. I don't know how accurate this lists is -- or if there can ever be a definitive list of top 100 anything -- but this is a good a list as any. Actually, it's better than most. It's also useful as a guide or check list for good science fiction.

Though for films, IMDb probably has the best set of listings. Maybe even for the top rated sci-fi titles because it's not just science fiction fans that contribute to the ranking. That kind of listing is more relevant in the "real world" since making films is, unfortunately, a little more about the financial bottom line than, well, anything else really. Such is life.