I'm curious to know the other UGer's answers to this question, because I haven't had a good song spark in about 2 weeks now.

I've written some poems, but I can't put anything to rhythm.

Just to make sure my creativity hasn't been sucked out of me, I wanted to ask:

What's the longest amount of time it's taken you to receive inspiration for a song?
I once went a month without anything creative. Not a riff. not a lyric. Nothing. Try playing an instrument you don't usually play.
Try listening to some new bands and genres. That always helps me with ideas. Learning songs out side of the style i normally play helps too.