Are you looking for a therapist? This is a great place to start looking for high quality therapists who specialize in depression and anxiety: http://treatment.adaa.org/.
Are you looking to learn a statistical method? This UCLA website vetted books on a range of topics and is great place to find high-quality text on various statistical methods: http://www.ats.ucla.edu/stat/books/.
Are you interested in learning more about academic productivity? This website interviews several academics and their productivity habits: https://howiwork-sci.com/.
Are you interested in learning more about career paths? This team at Oxford put together a great list of exercises and materials you can work through to help learn how to leverage your skills for the greater good: https://80000hours.org/.
Are you looking for scientific papers? This free website tries to make as many papers as possible available to the public: http://sci-hub.cc/.