The melody of For Once In My Life by Dean Martin runs 318 notes across 48 bars, 3:14 long in Eb at 100 beats per minute. The tab sits almost entirely in the first two frets, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? For Once In My Life chords and lyrics.