1. Google

I had to start with this because this is basically the website that I can't live without. My f*cking career is built by googling all the difficult problems that I had in my job. Heck, I even ask google on how to get my self a girlfriend. :)

2. Trello

I've been using Trello since the beginning of my adult life. It function as a kanban board where I write my tasks and organize my to do list. I use it to organize my life. 

3. Stackoverflow

Stackoverflow is a forum where all programmers go to ask for help. It categorizes and filters all of the questions so it is easy to find the answers that you are looking for.

4. Quora

Just like Stackoverflow, it's also a forum but more into general questions. You can even see Barack Obama answering questions here sometimes.

5. Youtube

I don't have TV at home so I watch Ted Talks, Crashcourse or Seeker channel instead.

 

Other websites:

• Facebook - of course I need to catch up with my family. 
• Soundcloud - good music
• Bloomberg - monitoring the market