Myself, at the moment I just use the 8 tracks/8 samples. Some tracks might have a drum loop that is sliced then I play those slices (kick, snare, hats) like a drum machine, on the one track and this gets recorded to make a new beat (trigs not audio).
Again, read the above mentioned pdf, it really helps to understand things.
The thing with the Octa is there are sooooo many ways to use it, from being a set of DJ decks to a full blown wavetable synth …