Reddit mentions of Tragic Sense of Life

There's probably a few ways you could go about expanding your knowledge base. The two that seem most fruitful are

1. Reading for a deeper understanding of the topics that you're already familiar with.
   
   
2. Ranging more broadly into other areas that may interest you.
   
   If (1), then I'd probably suggest one of two courses. Either, (a) read the stuff that influenced the existential thinkers that you've listed, or (b) read some literature dealing with issues related to the thinkers you've listed.
   
   For (a) I'd suggest the following:
   
   

• Anything by Kant
  
• (In the case of Kierkegaard) Hegel's Phenomenology of Spirit or his Aesthetics
  
• (For Nietzsche) Emerson's essays, Schopenhauer's World as Will and Representation, or Spinoza's Ethics
  
• Maybe some Freud for the later thinkers? Civilization and its Discontents is really good.
  
  For (b) it's really a mixed bag. I'd suggest going through the SEP articles on the thinkers you've listed and looking into some good secondary literature on them. If you're super interested in Nietzsche, I'd definitely suggest reading Leiter's Nietzsche on Morality. I really couldn't tell you more unless you told me something more specific about your interests.
  
  If (2), then I suppose I'd suggest one of the following:
  
  
• Readings in Classical Chinese Philosophy for a good, broad introduction to Chinese Thought
  
• The Analects of Confucius. This translation is excellent
  
• A Short History of Chinese Philosophy
  
• Heidegger's Being and Time
  
• Merleau-Ponty's Phenomenology of Perception
  
• Some of Rilke's work
  
• Unamuno's Tragic Sense of Life
  
  Again, it's hard to give you better directions without more information on what you're actually interested in. I've just thrown a bunch of stuff at you, and you couldn't possibly be expected to read, say, Schopenhauer's World as Will and Representation over break and be expected to really understand it.