This browser-based photo editor has all the functionality of similar, more expensive software, but for free:

https://www.photopea.com/

What board game rulebooks need to accomplish, and how the best ones do it (video)

Some common things that can delay your game’s production:

https://boardgamedesigncourse.com/kickstarter-lessons-everything-takes-longer-than-youd-expect/

The basics of how to make a board game prototype: bits, boards, and cards, plus how and when to make changes (video, 16:25-33:45)

Tips to help you organize shipping and fulfillment for your next board game Kickstarter project (audio):

https://crowdfundingnerds.com/episode24/

How to make tiles for your board game prototype—without getting your hands sticky with glue (video)

Graphic design for board game designers: fonts, numbers, card layout, color meanings, graphic design programs, and more (video)

Everything you ever wanted to know about player counts, from solo to massively multiplayer and everything in between:

https://www.universityxp.com/blog/2021/6/1/how-many-players-should-a-game-include

Elegance: how to define it, and how to use it when making game design decisions:

https://andrewfischergames.com/blog/elegance

A process for designing board games with both theme and mechanics in mind:

https://www.charliecleveland.com/the-theme-mechanics-seesaw/

What to expect after launching a Kickstarter:

https://boardgamegeek.com/thread/2665025/10-considerations-expect-once-youve-launched-your

Creating reasonable stretch goals for your Kickstarter campaign:

https://boardgamedesigncourse.com/kickstarter-lessons-you-dont-have-to-go-crazy-with-stretch-goals/

What are socially conscious designs and why they are important to the industry and beyond (audio):

https://ninjavspirates.libsyn.com/who-what-why-s28e02-socially-conscious-design-with-two-sarahs

Box labeling requirements for board games: CE mark, age label, country of origin, and more:

https://www.honestgm.com/blog-news-4864/Labeling-requirements-for-your-Board-Games-11640811.html

Various ways that games can use obfuscation to make the potential outcomes uncertain to players:

https://andrewfischergames.com/blog/obfuscation

10 steps toward launching a Kickstarter: building an audience, setting proper expectations, knowing your budget, choosing when to launch, and more:

https://www.redlinegame.com/10-steps-towards-launching-a-kickstarter/

Tips for preparing your Kickstarter campaign for the unexpected:

https://boardgamedesigncourse.com/kickstarter-lessons-something-unexpected-will-happen/

How the “tragedy of the commons” can be used in board games:

http://www.phantomknightgames.com/news/the-tragedy-of-the-commons-or-the-comedy-of-the-boardgame/

A short thread about any successful game’s “secret sauce”: what is it, how to identify it, and why it matters:

https://twitter.com/KevinWilson42/status/1393826340168687622

A short thread with some counterintuitive advice for making your game feel more thematic:

https://twitter.com/gilhova/status/1392336362225942534