For updates on whats happening in tech or business world, I read the websites famous for such stuff. E.g. TechCrunch, Xconomy, Inc, Fast Company, Entrepreneur etc.
For learning tech and business courses, I use Lynda, Udacity, Skillshare, and buy books written persons famous in their fields.
I decide which ones to go to based on the availability of the type of course I want to take and the reviews (friends, classmates, etc). Cost and time of the course are other considerations. Its best you try a free course first and gauge if you like it before you commit a lot of money and time into one particular website.