I’m not sure if they are the best but I currently follow:
Derek Sivers (great book summaries too)
Scott Adams’ Blog (lots of recent posts about Donald Trump)
Brain Pickings (long form exploration and discovery)
The 4-Hour Workweek (entertaining podcast)
Sam Harris (deeper topics podcast)
https://www.quora.com/What-are-the-best-blogs-for-improving-ones-thinking