Here’s what are considered to be the Top 100 Science Fiction and Fantasy books of all time. I’d have to say the list is spot on, and I was surprised to find that I had read over half of these books over the years.
Cool Blog: DeepGenre.com has a great article for newbie SFF novelists on what it takes to make a career out of writing Science Fiction & Fantasy novels. The true key to it all? Love what you do.