Know where data lives
Local, cloud and synchronized files behave differently.
Recognize account boundaries
A device login, email account, Wi-Fi password and app account are not the same credential.
Read prompts before approving
Permissions and sign-in prompts are easier to manage when they are not treated as automatic.
Use official help sources
Product interfaces change quickly, so current vendor documentation is often more reliable than an old generic tutorial.
General consumer technology information only. Interfaces and menu names change. Before resets, reinstalls, storage changes or other major actions, verify that important data is backed up and use current manufacturer/service-provider instructions.