Here's the last poetry recommendation. Tao Lin's new book, Cognitive-Behavioral Therapy, is really good. I like it a lot. You should buy it.
Here's a bit from my favorite poem in the book:
today is tuesday; email me saturday
[...]from here i know these things: that a hamster is a lonely fist
that a poem exists to dispel irrational angers, that i want to hold your face
with my face
like a hand
And for the record, yes, I'm the guy who "enjoys existential despair."