Every week I like to whip up a batch of butter. I skim six or so gallons of milk and add the cream to my electric churn. Years ago I read that if the butter seems slow in coming you should sing this song:
Come butter come
Peter’s at the gate
Wants a butter cake
Come butter come
Insert your name and sing to the tune of your choice.

I line a colander with fine cheesecloth and run cold water over the yellow lump to wash out all the buttermilk. Periodically, I'll wrap the butter in the cheesecloth and give it a good squeeze.