Cardboard has so many uses!!! I have used this piece of cardboard for at least 2 years. I don’t want to be wasteful!
I started using it to pour out my GemTac, which is what I use to adhere small beads to my crochet work (I think it looks better than sewing for my ice cream scoop hair pieces). I also used to use another piece of cardboard exclusively for hot glue, but then I invested a whole $5 into a reusable hot glue gun pad, which is way awesome (hm, it looks like it’s $7 now, so maybe visit your craft store to see if it’s cheaper?). But I still use my trusty cardboard glue board for other adhesives. Check it out! Gross, yeah? I mean, artistic!!!