Being a uni student sucks, especially when I'm trying to learn something as complicated as harmonic minor. Now that I've got all the shapes of the scale covered, I just improv over some minor backing tracks I found. During the improvs I'd make sure to use as much bending or hammer ons and pull offs as much as I can. When I have more time I learn parts of songs (today i learned the intro to Riding With the King by Clapton and BB King). I really need to work on speed but lately I haven't had the time