I recommend that you pick one scale and really go deep with it, finding out over the next week, month, or year hundreds of new ways to play it. Try these variations: - Instead of starting on the first note of the scale, try starting on every other note of the scale. What about alternating your ending note too? - Play short segments of the scale in increasingly higher or lower plateaus. How high & low can you go? - Play increasingly higher scale segments ("mountains") or increasingly lower scale segments ("valleys")