My sewing box was a pile of thread. Today I wanted black. I dug around. I found red, pink, purple, green, dark blue, light blue, more pink. No black. I could have swore I just bought black, but as it wasn't to be found, I went with purple. But it really bugged me, I know I have black. So I took everything out and found not only black, but the lavender and variegated metallic I was looking for earlier in the week.
Annoyed with myself for buying what I already had, I separated everything by color, placed each color in an envelope, and smudged everything with incense.