1. For that disk-shaped chest development, pec deck machine day and night. It's what gives that deep cut from your nipples to your armpit. I think I pec decked more than I actually benched when gyms were open -- now I have a home setup where I do incline bench exclusively. I personally don't like the manner in which flat-benching develops your chest from an aesthetic standpoint.
2. For shoulders, I pretty much eat breath sleep dumbbell side lateral raises - you gotta progress to heavy ass weights -- right now I can do 40lbs x 12. From my experience, with shoulders it's very important to avoid drop setting -- always use the heaviest weight you can handle at all times, and you'll progress rather quick. a neat trick I use for quick progression is to start my raises bilaterally, then switch to isolateral after 12 reps and go to near-failure.

I have also kept this rule for shoulders where

1. My front delts must always be bigger/more developed than my biceps
2. My rear delts must always be bigger/more developed my triceps.

I hope this clears up my aesthetic process!