Props to Elizabeth Ingram, the 4th-grade teacher in Texas who posted it. Extra props to her or whatever student whittled that thing down. If all of us used every consumable on Earth that thoroughly, the environment would be in better shape. (Not because we saved millions of pencils, but because of the minimal-waste mindset.)
And that was achieved with just a cheapie No. 2 pencil. As designers we're more likely to have pricey Prismacolors on our desks, and in my shop I go through a fair amount of General's Charcoal White pencils (for marking on darker wood species) that I don't like paying $1.20 for. What's the best way to use them all the way until the end?
For pencils with attached erasers, your only option is to whittle, like in Ingram's Instagram post above. For eraser-less models, you've got more options.
These will help get you closer to the end of a pencil's useful life by providing grip, but there's three caveats:
1) The collar limits how far you can insert it into a pencil sharpener, meaning you'll still eventually have to whittle, file or sand to get a point.
2) You can't go all the way to the end.
3) If you've got a lot of pencils nearing the ends of their lives, do you really want to have to buy a set of pencil extenders?
I figured there's no way this would work, but Carrie Lewis, feature writer for Empty Easel, writes that glue is her preferred method. Her clamp? An old clothespin.