Seriously important to make your subscriptions very carefully in apps like lemmey, reddit (if you have access to a third party app) and newpipe (youtube where you can set your startup tab).
It makes all the difference in the world never to land on /r/all, suggested for you or any sort of trending pages.
Read books like the others have said and only subscribe to channels and communities that forward your productive aims.
As a photographer i love it