I surely got this idea from elsewhere, but just passing it on.  I'm finding it helpful when (re)learning an unfamiliar/unpracticed/rusty key.  Idea is (1) from a record or other source, find a sample you like, preferably a portion lacking a strong melodic line.  A bass line that features only roots, or roots and fifths, leaves the most options open for using under various types of scales (e.g. major, dorian, blues etc).  On this example I sampled a choice segment from an awesome Cal Tjader & Eddie Palmieri track whose bass line features root/fifth.  (2) Load your chosen sample into your DAW, (re)pitch it so the key center of the bass line aligns with the key center you want to practice (if it's not already there).  On this track, I repitched the bass line root to B 'cause the key of B maj was the key I was focusing on. (3) Loop the sample at a natural place that keeps a flow going.  (4) With your instrument, practice the notes and different chords from the key/scale you're currently focused on.  

I guess it's kinda like a drone, in a way, but slightly less static, and samples come with their own rhythms, and the rhythmic aspect can be motivating.  I find I practice longer than I would if the backing wasn't happening, so maybe other players could see a similar effect in their practice.

a way to help add a bit of fun to scale/key practice?

one first-wave Gen Xer guy's hobby music page

a way to help add a bit of fun to scale/key practice?

Greg