I went through this a year ago! Fortunately, we had gone through my parents things when they down sized to an apartment, so there wasn’t too much stuff to go through. One piece of advice I would have is label photos/important items. We went through a ton of old photos with my parents and loved knowing who was in the photos, when they were taken and where. I know if I had found all of those photos once they had passed, I would not be able to track down that information.