I think I improved my internet usage habits when I started categorizing my usage into either "content" or "comfort" and examining when and why I was using either, with an eye to reducing the reasons I was subconsciously seeking out comfort material. That's helped me both reduce stress behaviors in my life and maximize the fraction of time I spend exposing myself to things that are actually worth remembering.

Small things, like listening to an audiobook while you do laundry instead of the same three albums you listen to every day, can have a marked effect on your sense of personal growth.