In general thenextweb.com, techcrunch.com and producthunt.com altogether with many other news portals.
As a professional in specific field, you should know your tools and key persons in that field and follow them. For example, if it's Machine learning, you are following Andrew Ng and Jeff Dean, right? Anyway, you should follow key CEOs, CTOs around the world. Finally, you should have own network and follow your friends and other people. Everyone and everything is on Facebook/Twitter/Quora/Medium. Visit those platforms at least few times per week.
Set up your Facebook news feed, it is #1 world's information aggregator.
Join professional and regional groups on Facebook as well. Eventually, you will start following everything in one place. Just make sure you are not infinitely scrolling down and clicking on every cat gif.