One arrangement with the publisher of my two "text"-books was that the price be reduced by the amount of the otherwise-royalty for any books sold through the university bookstore, so that, in effect, I was not collecting royalties from students at this university (whether or not I was the instructor).

Another aspect is making printouts from PDFs available at-cost to students at this university, which is what my contract with the publisher specifically allowed in one case.

Is it ethical to profit by having my students buy my textbook?
I have recently been trying to hone in my improvisational skills. I'm stuck in the first position of the Am pentatonic box and can't move away from it. Whenever I try to move out of it, I randomize the next box that I go to, which most of the time leads to bad sounding improvisations.

I have narrowed the problem down to it being me having a bad sense of rhythm. I think I've got technique as a rhythm guitarist, but in regards to musicality, I don't. 

I don't know which chords go together well, what goes after a chord, how minors, majors and 7ths are formed (don't know if this is important to be a good rhythm guitarist though), etc.
