Haikus are easy to do.
You just need 3 lines.
One the first line the phrase must be 5 syllables.
And on the 2nd, 7 syllables.
And on the last, 5 again.
They can be about ANYTHING, but traditionally about nature, etc.
Example:
You do a haiku
5 7 5 syllables
This is a haiku
My Haiku:
Bridget is sexy
What the hell? She is a he?
I need therapy
Ahh, wow it rhymed too.