The three things to sincerely follow

• Always seek out truth by yourself. (Ryu Kunn also says this). Let not others' opinions/behaviors/actions flay your emotions.
  
• Have fun in everything you do. If it is not fun, then don't do it. Pursue happiness by looking for fun in the things you do.
• Constructing a world view is not a one time task. As one's knowledge and experiences grow, world view changes. So, to keep improving one's world view is to keep improving one's knowledge and experiences.