It's pretty similar to small dogs, but you have to be a little more strict about who's boss.
While many big dogs don't grasp their size when growing up and being playful, they tend to understand when they're upset or being aggressive. Making it clear you're the boss and you're in charge is actually pretty key. You don't want to go so far as to make the dog feel like they're only your pet, but you also can't entirely let them instinctively be themselves either. If the dog doesn't respect you, it won't bond near as well. Don't be too harsh, but also definitely don't smother a big dog with too much attention. They need boundaries but also need their space.
Bigger dogs also need to get that extra energy out. If you don't play with it much and let it run around, it won't ever be near as happy as it would otherwise, and won't bond as well. As tired as a big dog may get, if you've exhausted enough of their energy, once you already have a decent bond, they'll typically want to rest around you instead of elsewhere, even if it's a bit of a walk from where they are at the moment.
