Keep a thing seven years and you will find a use for it.
Keep no more cats than will catch mice.
Keep something for the sore foot (or for a rainy day).
Keep thy shop and thy shop will keep thee.
Keep your mouth shut and your eyes open.
Keep yourself from the anger of a great man, from the tumult of a mob, from a man of ill fame,
from a widow that has been thrice married, from a wind that comes in at a hole, and from a reconciled enemy.