When listening to The Beatles, it's important to remember that they pioneered the modern album. Before The Beatles, everything was about singles, but when they started dropping Sgt. Pepper's Lonely Hearts Club Band on everybody, albums started to take precedent. That said, The Beatles have always had a tremendous number of non-album tracks because they were always churning out hit singles in addition to their transcendent albums.
Past Masters Volume 1 covers the non-album tracks from 1962 to 1965, and it's interesting to see how many recognizable Beatles tracks existed in single-only form (discounting, of course, the bastardized Capitol Records versions of early Beatles albums). Tracks like "She Loves You" and "I Wanna Hold Your Hand" are featured on this excellent compilation. When it comes to Beatles compilations, it's hard to beat Past Masters.