A career-related website

Hi everyone! today I'm going to talk about the websites that I like and I visit very often, and why.
You see, the websites in these days are a harmful tool for a lot of people, because they contain tons of information of anything that can cross your mind. The first website that I currently visit is youtube (www.youtube.com) because I listen to music everyday, and watch explaining videos of math, physics, chemistry, etc. , and in youtube you can find a lot of options and a more didactic information so for me that's very cool; the second one that I like and currently visit is coursera (www.coursera.org) wich contains a lot of courses that you can do and get certifications that you did the course. There are free courses that are very cool and usefuls, and so you can find others that you have to pay but they are not expensive at all, it's exciting know that you can do and get form in a lot of fields, so that's why I visit a lot this page.
I enter these websites very often, I would say that everyday I check both. Even though I'm always on Facebook (www.facebook.com) and Twitter (www.twitter.com) but I don't use it very much for get inform about importants subjects.
So that's all, hope you are ok and good luck.
Regards