Personal information management

Personal information management (PIM) is self-explanatory as it is.

This also includes managing File metadata, Note-taking, library management, and much more.

Practicing information management

While there's no correct way to practice PIM but to start:

Maintain your own digital library which can make managing personal belongings from your personal photos, academic libraries and references, and your anime collection all the more easier.
While not a good one, the 3-2-1 rule is a good starting point for practicing backups. The rule is simple: 3 copies of your data stored in 2 media (e.g., internal hard drive, external storage) with at least 1 of them stored offsite of your computer (e.g., remote location, cloud service).
Start to manage File metadata but only for the most relevant resources.
Start to Use timestamps as a future-proofing method.