I used to get a kick out of writing several letters out, like,

A
B
C
C
D

C
D
A
D

B
A
C
C
D

And making the ends of lines with the same letter rhyme.

I'd also try to break the sentences in strange places, so that when I'd read the poems they wouldn't rhyme in an obvious way, but the reader just might find their brains twitching erratically from the teasing snatches....like a faint ringing in the ear....

*evil laughter*

Regards,
Tyler