Tips for "Care and Feeding" of my Instance - Disk Usage Rising

Any helpful tips for general care and feeding I should be doing on a regular basis?

I know I need to keep an eye on updates and re-run my ansible setup form time to time to stay up to date.

But I have also been keeping an eye on my VPS metrics to see when/if I need to beef up the server.

One thing I am noticing is a steadily increasing disk utilization (which mostly makes sense except its seeming a bit faster than I expected as most all media is links to external sites rather than uploading media directly to my instance).

Anything I can do to manage that short of just adding more space? Like are there logs/cached content that need to be purged from time to time?

Thank you!