The requirement for the December 2017 24-hour contest is "reindeer":

https://boardgamegeek.com/thread/1893916/24-hour-contest-december-2017

“It’s really easy to blame players for a bad test (and sometimes bad tests will be due to the players). But blaming players instead of treating the test like a problem to be solved won’t help your game get better.”

— Nat Levan

How a board game's design can keep players in a "flow" state:

http://analoggamestudies.org/2017/11/the-experience-of-flow-in-hobby-board-games/

Advice for teaching and demoing your game in various settings (audio):

https://www.buzzsprout.com/48513/600462-episode-38-teaching-and-demoing-your-game

Tutorial videos for using Card Maker Beta, the card-creation program:

https://www.youtube.com/watch?v=_nIK6w8cYR0&list=PLdzRBty0sWLlswz81-FNNw_BNUfDhJnWg

How designers should help when their game is on Kickstarter (audio):

http://www.buildingthegamepodcast.com/2017/11/26/episode-287-kickstarter-plinko/

A process for simplifying a game design:

http://pulsiphergamedesign.blogspot.com/2017/11/simplifying-game-design.html

Why you shouldn't assume players' prior knowledge in a rulebook:

https://boardgamegeek.com/blogpost/71133/boardgame-rulebooks-sweet-potatoes-prior-knowledge

“If you’re consistently getting negative feedback on a design element it means it has to go, no matter how much you like it.”

— Daniel Newman

Advice for how to grow and become a better game designer (audio):

http://www.pgipodcast.com/blog/episode-23-growing-as-a-designer/

Where the money flows when someone pays for a board game:

At a store: https://www.youtube.com/watch?v=GVgDs-Ub34E (video)

On Kickstarter: https://www.youtube.com/watch?v=rFpKuGqkYLM (video)

How to address a runaway-leader problem--a Reddit tabletop game designers forum discussion:

https://www.reddit.com/r/tabletopgamedesign/comments/7f44bz/how_do_you_prevent_runaway_leaders_in_area/

What to expect when your game starts to feel "almost finished":

http://brandonthegamedev.com/the-agony-of-the-almost-finished-board-game/

Scrappy ways for a small publisher to make a name for their company (video)

What to do in the earliest stages of a game design (audio):

http://ludology.libsyn.com/ludology-episode-164-first-steps

Thoughts on modern racing games:

http://faidutti.com/blog/?p=8817

What to expect from the first few playtests of a new design:

http://brandonthegamedev.com/4-things-to-expect-on-the-first-play-test-of-a-new-board-game/

This tool estimates the cost to manufacture a game:

http://howmuchtomakeaboardgame.com/

A roundtable discussion about designing expansions (audio):

http://www.theboardgameworkshop.com/2017/11/episode-25-expansions.html

Tips for rapidly creating new versions of your game to iterate quickly (audio):

http://www.boardgamedesignlab.com/how-to-iterate-like-a-boss-with-kirk-dennison/