I'm pretty sure that I lost my sketchbook/journal, and all that there was within.
It was the most interesting and informative object about my past, and something that I was hoping would inspire or entertain me in the future too. It was pretty thick, I probably started with it about 8 years ago, which is more than 1/3 of my life at the present. I was rarely adding content to it, but there were still many personal notes, designs, drawings etc. in it. Many memories, many thoughts. In short it meant a lot to me. I do feel kind of... down. But it'll pass.
It's a good thing that we can store information digitally nowadays.
In a way this actually freed me from my past and forced me to focus more intensely on my future I guess. I can't rely on my past creations, must keep creating.