I'm still working through Janek Gwizdala's ii-V-I book... very slowly.
I just moved on from mapping out the 1st, 3rd, 5th, and 7th degrees for each chord to adding a half-step approach tone for each.
Here's me trying to incorporate it... it's slow work and I can't really do it in realtime at all but I figure if I do about 10-20m a day of this, it'll get easier.