Let's talk about spindown D20s and how we can use them to their fullest potential. If you don't know what a spindown D20 is, a regular D20 has the numbers 1 through 20 scattered around the die in a non-sequential order. A spindown D20 is in sequential order so the 17 is next to the 18, is next to the 19, is next to the 20. How could that benefit us? Well…
Counters
Let's start with what numbers were invented for. Counting. What could we count with some spindown D20s? Count the parties stock on torches, count the enemies hit points left, count the amount of creatures in a swarm. Why would you need to keep track of this stuff on a dice of all things? Convenience. Stop taking away time during the game scribbling and erasing in your notes. Need to keep track of multiple things at once? Get a red die for the goblins HP and a green die for the amount of arrows it's carrying.