A Creative Blank

I like to write poetry, and for a while last year I was doing reasonably well, with my creative flow...well, flowing. But now, for whatever reason, I just can't seem to get back into the swing of it, there's something missing. I've tried several times putting pen to paper, but to no avail, I just don't have that 'spark' that I need, hell, even after spending roughly four hours at the airport last week didn't help...*sighs* ah well.