I would go through and hold each item and ask: "if I lost this would I be upset?" And, a second question: "if I didn't have this, would I buy another one to replace it?" If you say "yes" to either question, then you should keep it. If not, you should consider donating it or getting rid of it. Honor memories by keeping a few precious items and letting go off the ordinary items with little meaning. Hope that helps a little.