Books are the best in my opinion as they require lots of structuring of thought before writing, and might go through a sometimes brutal editing process. But pick sensibly, business books, self-help books and the current weeks best-sellers should probably be avoided.
Some higher quality publications exist on the internet, such as nautilus, IEEE spectrum, No Tech magazine, The Baffler, Quanta magazine, Aeon, Le Monde Diplomatique, Current Affairs, The Public Domain Review, Spiegel International, writings by The International Consortium of Investigative Journalists, Foreign Policy, New Scientist, Science magazine, The Economist, etc.
While not perfect, these might keep you busy for a while and give you a broader perspective.
Some higher quality publications exist on the internet, such as nautilus, IEEE spectrum, No Tech magazine, The Baffler, Quanta magazine, Aeon, Le Monde Diplomatique, Current Affairs, The Public Domain Review, Spiegel International, writings by The International Consortium of Investigative Journalists, Foreign Policy, New Scientist, Science magazine, The Economist, etc.
While not perfect, these might keep you busy for a while and give you a broader perspective.