I'm not a poem writer, but I do enjoy creative writing and I've found when I'm facing any form of creative slump going somewhere new is always helpful. Taking a walk and observing the architecture(historical context of the neighborhood), sitting in your local library, a shower/bath, visit a restaurant, a park, take a break and go hang out with friends with a notebook tucked in your bag just in case.
Changing scenery always does me wonders.