With a program as demanding as most conjugate methods, you'll want to make sure your GPP is pretty good going into the thing, and that you keep it up or improve it.
I do this with my quaterny and quinary assistance work by keeping rest periods very low and reps and volume high. This can also be applied to the rest of your assistance and supplemental work.
I also do mini workouts throughout the week usually with bands for very high reps and very little strain. This is done to promote blood flow and recovery and some for extra volume depending on resistance. I might do very easy sets of 10 for volume, very easy sets of 25+ for recovery is the way I do it.
I also stretch, foam roll, and walk my dog, and take fish oil/glucosomine/MSM regularly.