I only slept in the recliner the first night, after that it was on my back on my futon mattress for a few nights, then I was able to very carefully sleep on my side.
I recommend a laxative the night after surgery, or the morning after. Stool softeners didn't cut it for me.
Stock up on non-stick gauze squares for your nipple dressings. 2x2 if you can find them, or 4x4 can be cut up. And paper tape - it's the least irritating tape to keep those squares on.
Get some kind of wet wipes since you won't be able to shower until the drains are out.
Figure out hair washing. My mom did mine in the kitchen sink with the sprayer attachment every other day. It helped that my hair was super short.
I was on Keflex for 10 days after surgery, and had a yogurt every day to balance out the bacteria needed in the stomach.
TAKE THE PAIN MEDS. On time, every time. My mom logged every dose so there was no doubt of when I took one, and when it was time for the next one.
If you have pets, figure out a way to keep them away from you. They WILL touch your chest and it WILL hurt. One of my 5 dogs never paws at, head butts, or jumps on me, so she was allowed to sleep with me about the 3rd or 4th night, I think.
Button down shirts or zip hoodies. You're not pulling anything over your head for weeks. And pants that pull on/off.
Congrats on your upcoming surgery

-Jay