Initially I was watching YouTube movies related to psychology on this channel : CrashCourse
As related videos I have found the School of Life. I was amazed to see all this knowledge in one place nicely packaged and organized. It took me some time and some digging to find out about the latest project of the school : The Book of Life. I did not finish it reading/understanding but one chapter had a huge impact on me… Self Knowledge. I would recommend you to take the questionnaire and allocate time to read and understand the entire article. ( i would even recommend to use several days ).
Many thanks Alain de Botton.