I've been trying something like the following lately:
Other leg work
Other back work
Other arm work
Other posterior work
If I'm doing more volume in total, I'll add in some other work or perhaps squeeze in the non-compound work again when it isn't the day before a related compound lift.
A "high volume" week recently went like this...
Squats, quads, hams, shrugs, lat raises
Chins, pullovers, rows, curls
Bench, dips, hams, lat raises
Standing press, cardio
Incline DB press, deadlift, shrugs, hams.
So, as you can probably see, lifts on areas that need work are added in whenever a muscle feels good and isn't primarily used in a compound lift the next day.
Compound lifts are at lower rep ranges while isolation work is at higher rep ranges.
Finally, I'm not claiming this is a good plan or anything, but I have the time to spend in the gym these days and I'm enjoying it...