Every time I feel sick, wake up and just want (or need) to go back to sleep, or pretty much have to do something I don't want to do, I start saying to myself:
"'I cannot go to school today'/Said little Peggy Ann McKay"
"Sick," from Shel Silverstein's Where the Sidewalk Ends is my favorite poem of all time. Because I constantly quote it is one reason, the others are because it rhymes (poems should rhyme, it's a fact), it's funny and it's relatable for kids AND adults. I also hate most poetry (not all!) which really helps to narrow it down.
So even though it's just the one poem that stands out for me, though I do enjoy the others, Where the Sidewalk Ends, is one of my favorite quotable books and most certainly my favorite quotable poetry collection.
Fun facts: Did you know that Shel used to write and draw cartoons for Playboy? He also had zero intention of ever writing for kids. Johnny Cash's song "A Boy Named Sue"? Shel wrote that. The more you know.