we had to do that a while back when dh's grandmother died and we had to clean out her termite infested house-we couldn't keep any sort of heirlooms, nothing, save some pics-so I understand what it means to have to toss that amount!
What helps is to really be clear on what is important-I think someone on this forum said to consider what you would grab if you were in a fire, or had only an hour to take what you needed-what is important to you? (then of course the bare necessities of pots and pans,etc.) And go from there.
Wife, mom to 6 great kids!...avid crafter, music lover, reader, gardener!