Two men have been sitting out on a lake all day long ice fishing.  One has been having no luck at all and the other has been pulling fish after fish out of his hole in the ice.  The man having no luck finally leans over and asks the other what his secret is.

'mmmmm mmm mm mmm mmmm mmm mmm' is the reply.

'I'm sorry, what did you say?'

'mmmmm mmm mm mmm mmmm mmm mmm' the successful fisherman repeats.

'I'm sorry, I still didn't understand you.'

The man spits something into his hand and says very clearly, 'You've got to keep your worms warm.'