It starts with relying less and less (as is possible) on outsourced digital assets such as photo storage, social media accounts, etc. while I'm still alive.

After that, I have strict requirements (and instructions) in my estate for accessing and deleting the few accounts I still need at that time. I'm fortunate enough to have started using a password manager as early as 15 years ago, and used it diligently, so redundant access is as easy as possible.