The sentimental category is always the last category to tidy because it is the most difficult.
Family keepsakes and items that we have kept since our childhood have a special place in our hearts. Stuffed animals, trinkets, letters, and cards etc. should all be stored in a way that allows you to enjoy them when you feel like reminiscing. By purging the things from our past that no longer hold any value gives you the freedom to move forward into the present moment.
For my sentimental items, I keep my photos in a beautiful box and they are organized by family member, cards and letters are filed in my filing cabinet and a few of my childhood items are displayed in an armoire.