If you are likely to do early morning walks in the winter (or evening ones) then a head torch so you can see the poos but still have free hands to pick them up.
Use any cardboard boxes/packaging (amazon brown paper especially good for this) to sprinkle a few treats in and become your home made dog treat snuffle toy. Bonus points if the dog then tears it up so it fits more easily into the recycling bin.
Train him to accept a muzzle (soft and basket) now - it makes for a good 'game' and may come in useful later in life for things like tricky vet visits.
At 8 months old, it may soon be time to say goodbye to your puppy and a 'see you on the other side' to a teenage pita - hopefully your own will sail through adolescence like a breeze but if he doesn't, just know he will likely come good again when he grows up.
If you've a tendancy to 'waste' your recall word by using it even when he's not going to recall immediately, think about introducing a whistle and work to establish an immediate recall using it. It's harder to misuse it at the wrong time.
Do not feed every meat under the sun. Keep some slightly unusual but easy to buy meats back just in case of allergies and intolerences. I would keep back things like kangaroo, duck, venison as reserve proteins.
Add a spare collar (and tag) to that lead in the car.
Lots of handling practice, when handling is not needed. Things like rolling over so you can see his belly. Paw handling. Eye handling, Ear handling. Mouth handling. Go slow and make it fun. All will be invaluable if you need them in the future. (e.g. I once had to convince the dog to stay rock still while I took a tick off his willy - it was tiny and took a few attempts; our previous belly practice really helped).
Frost is your friend. It makes muddy walks suddenly clean ones and makes it far easier to pick up frozen poos in the garden. Never put anything off because it's frosty!
I also agree with treats everywhere, the dressing robe (e.g. ruff n tumble), wet wipes in the car, crocs by the back door and poo bags in every single pocket of every single coat.
Take photos and videos ALL THE TIME. You can never have enough of these - especially from the early years.