Find out if your addiction is because you find the world boring, or if you're trying to escape from something you fear.

If it's the former, block the addictive content and replace it with other things you find fun (hobbies, books, movies, etc), paying attention to how it's more worthwhile to do so.

If it's the latter, find out how to overcome such fear / anxiety and to stop using addictive content as a crutch.