The first thing I did when I got my first Octatrack was just load some basic drum sounds on there.
I then experimented with loop points/retriggers to make a bass sound out of a snare, and used the crossfader to mess with it. Then filtered the whole track on another crossfader scene. It’s really fun to make these song progression crossfader scenes. In a few minutes you’ll have begun writing a new song 
Definitely read the manual every day though, and watch lots of videos. I’ve had my Octatracks a year and a half and I’m constantly thinking of new ways to do things, new tricks, techniques. Amazingly deep, I am in love.
