The basics of getting a cost estimate for producing your game:

https://brandonthegamedev.com/how-much-you-should-spend-on-board-game-manufacturing/

“Game designers: please don’t say that your game is ‘the most unique ________ game in years’ because it probably isn’t. It likely does have cool and unique aspects, but just tell me what those are. Spend your two minutes describing them, not hyperbolizing.”

— Lauren Woolsey

How to make games that appeal to both kids and adults (video)

How much should you spend on advertising for a board game Kickstarter?

https://brandonthegamedev.com/how-much-you-should-spend-on-board-game-advertising/

How to make an engaging board game tutorial video (video)

Basics of market research for board game makers:

https://brandonthegamedev.com/how-to-find-an-audience-for-your-board-game-make-them-happy/

Rita Orlov of PostCurious discusses the ins and outs of designing escape-room and puzzle games (video)

A free set of sketchy illustrations that might work for a prototype:

https://www.opendoodles.com/

Matthew Dunstan on co-designing, making story-driven games, creating expansions, and more:

https://www.diagonalmove.com/interview-matthew-dunstan-designer-of-monumental/

“Take ideas that you’ve developed over the years playing other games, and then put those ideas into a new way of playing something old, or a new way of playing a familiar concept. In doing so, you can develop a new game that hopefully many people around the world will enjoy.”

— Ken Johnson, designer of Phase 10

A multi-part series showing how to create a board game prototype in Tabletop Simulator (video)

Six answers to “what if someone steals my idea?”:

https://stonemaiergames.com/what-if-someone-steals-my-idea/

The basics of how to create a board game—clips from a panel discussion with industry figures:

https://blog.mindresearch.org/blog/how-to-create-a-board-game

Tips on wholesale and retail distribution (audio):

http://fundingthedream.buzzsprout.com/4646/4183211-ep-334-tabletop-wholesale-and-retail-distribution-explained-by-hitpointsales

Unique business model leads to success (audio):

https://indieboardgamedesigners.com/jonah-kellman/

Lots of great content for those in the publishing field (audio):

https://breakingintoboardgames.libsyn.com/breaking-into-board-games-episode-120-connor-alexander

“Use whatever tools you can to get to a first playable ASAP - scrap paper, rules in Notepad, scribbled diagrams etc. then play it out yourself or with someone ASAP even if (especially if) you realize it’s crap within 5 minutes and have to redo everything.”

— Aaron Lim

Lots of free 2D and 3D icons and elements for games:

https://kenney.nl/assets

Wargame designer Hermann Luttmann offers advice for new designers:

https://www.diagonalmove.com/so-you-want-to-design-a-board-game/

Erica Hayes-Bouyouris on designing for the hobby market vs. mass market, co-designing, working with an intellectual property, having an online presence, and more. (video)