This interview is almost three years old, but it’s a great — and itself funny — discussion of how to make writing funny.
http://www.npr.org/templates/story/story.php?storyId=111456667
I think my writing’s funny, but it’s often a frontal assault kind of humor. Like my idols Joe Lansdale and Christopher Moore, I hit readers over the head with something gross, vulgar or ridiculous. They laugh out of self-defense.
For example, check out my story “Waiting for Venito”, up at my fiction site. Safe for work, but not safe for kids.