For how long to you plan to do this one poem per day thing? I feel this sort of rush to memorize will result in low quality to quantity ratio. I myself have never sat down to memorize a poetry or prose, yet there are some lines that have seared themselves into my memory. For example, I memorized  "But then I sigh, and with a piece of scripture, Tell them that God bids us do good for evil; Thus I clothe my naked villainy with odd old ends stole from Holy Writ, And seem a saint when most I play the Devil" from Shakespeare's King Richard III because it was so powerful. It was not out of a desire to be able to quote anything, but rather because I had found a mantra of sorts, a few lines of writing that somehow I felt summed up my entire life (Back when I read it. I am a different person now, yet I dont think I will ever forget those lines). IN your position I would set a more open ended goal "read more good poetry", and then if I came across anything that really resonated with me, I would memorize that.