Nothing bogs down an epic Dungeons & Dragons session like four people thumbing through a player's handbook for 10 minutes. With a few sticky label tabs, you can find what you need without slowing your games down.
— Teagan Morrison (@TeaganMorrison) February 15, 2017
He got some sticky label tabs and placed them in his Dungeons & Dragons Player's Handbook for each section. That way it's much easier to quickly reference whatever he needs on the fly -- which, if you've ever played a tabletop RPG, you know happens a lot. Now when someone asks "What's the range on that one ranger spell that does that one thing?" you can find it in a flash.