The only puns I can think of at the moment is...

An auction at a funeral is a bit more bid.
Burial insurance are something everyone digs.

I can't really remember any riddles.

I got these from some random site.

Energizer Bunny arrested - charged with battery.
A man's home is his castle, in a manor of speaking.
Without geometry, life is pointless.
Beauty is in the eye of the beer holder.
I wanted to be a mime, but I talked myself out of it.