The requirement for the January 2018 24-hour contest is "hope":

https://boardgamegeek.com/thread/1911581/24-hour-contest-january-2018

Game design inspiration: what makes board game designers keep designing:

https://goforthandgame.com/2017/12/27/the-big-answer/

18 New Year's resolutions for board game designers:

http://brandonthegamedev.com/18-new-years-resolutions-for-board-game-devs/

“Before you spend hours and hours writing content for a prototype, playtest the core, core mechanic of your game. If that isn’t at least a little fun before any content is added, it’s not worth making.”

— Peter C. Hayward

Two articles exploring potential ways of designing a game's endpoint:

http://www.gamesprecipice.com/endings/

http://makethemplay.com/index.php/2017/12/27/5-ways-of-ending-your-board-game/

“When you design something and get it out, there are some who will not like it, no matter how much effort you put in. And that’s okay- there is something else out there for them. The main thing is to get it out... Don’t be so worried about what people will think.”

— Byron Collins

The purposes of blind playtesting, and how to know when you've done it enough:

http://brandonthegamedev.com/how-many-blind-play-tests-does-your-board-game-really-need/

Intellectual property, trademark and liability in board games (audio):

http://thegamecrafter.libsyn.com/game-law-with-zach-strebeck-and-the-game-crafter-episode154

Advice for how to create a good player experience (audio):

http://www.boardgamedesignlab.com/crafting-the-player-experience-with-matt-leacock/

How a game's structure can affect player engagement (audio):

http://ludology.libsyn.com/ludology-episode-166-impulse-control

Writing a comprehensible rulebook (video)

How long it will take to make your game, at a bare minimum:

http://brandonthegamedev.com/the-long-haul-project-why-making-games-takes-a-long-time/

Advice for how to filter playtester feedback (audio):

http://thegamecrafter.libsyn.com/filtering-feedback-with-the-game-crafter-episode153

Some of the challenges that come with using licensed IP in a board game (audio):

http://theforbiddenlimb.libsyn.com/total-recall-post-mortem-ep-62

How to make prototype tiles that last:

https://boardgamegeek.com/blogpost/71644/hands-practical-guide-making-prototype-tiles-last

Are there principles of "good" game design, and if so what are they? A BoardGameGeek designers forum discussion:

https://boardgamegeek.com/thread/1900554/open-discussion-principles-good-design-and-poor-de

How indie game publishers make money:

https://www.reddit.com/r/tabletopgamedesign/comments/7ig5bh/curious_how_indie_game_publishers_make_money/

Different ways of handling turn order in a combat-based game:

https://www.reddit.com/r/tabletopgamedesign/comments/7if8z0/discussing_turn_structure_in_wargaming/

Why "dead" turns and lose-a-turn mechanisms are frowned upon in modern games (video)

The ins and outs of designing an escape-room game (audio):

http://www.boardgamedesignlab.com/designing-escape-room-games-with-juliana-patel-and-ariel-rubin/