A short on thread on where to describe various card powers and iconography in your rulebook:

https://twitter.com/Mattyleg1/status/1570404449264304131

Pointers for writing rulebooks for the purposes of playtesting, contests, and publisher evaluation:

https://shippboardgames.blogspot.com/2022/06/on-rulebooks.html

How to write the opening paragraph of lore for your board game:

https://shippboardgames.blogspot.com/2022/05/inciting-incidents.html

A chat about the nitty-gritty of rulebook editing: structure, presentation, terminology, and lots more (video)

A quick breakdown of how to write a board game rulebook, including the purpose each section serves:

https://makerules.net/

Notes on the best place to define important terms in your rulebook:

https://twitter.com/SenFoongLim/status/1479577165461135367

“Heuristics for creating best-of-breed game rulebooks:

• blind playtest a TON
• test with folks who don’t read rules or play games
• be in the room, observing each test
• treat layout, pictures, and words as one unified piece of exposition”

— Nick Bentley

A short thread on when to capitalize terms in rulebooks:

https://twitter.com/lackingceremony/status/1473099353153699842?s=11

Game design lessons, revisited with eight more years of experience (video)

Why you should write your rulebooks in the second person:

https://boardgamegeek.com/blogpost/124785/writing-rules-pronouns

Style tips for how to use numbers in a rulebook:

https://boardgamegeek.com/blogpost/122060/writing-rules-when-use-numbers

The information that you should include in your rulebook’s components list:

https://www.boardgamegeek.com/blogpost/121618/writing-rules-components-and-setup

Different ways rulebooks can serve as better learning and teaching aids for players: quick-start guides, glossaries, player aids, and more:

https://shippboardgames.blogspot.com/2021/07/design-for-learning.html

Advice for writing clear rulebooks, including through gameplay examples, repeating rules, formatting, and more (video)

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

How to organize information in a board game rulebook (video)

A section-by-section discussion of what makes a good rulebook (video)

“Reminder: good, clear rule books are the difference between people playing your game and instantly loving it or getting fed up and shoving it back on a shelf.”

— Ann Jones

Sample rulebook template in a Google doc:

https://docs.google.com/document/d/1-scVt3i6coNWHx6wOqPMq4701yv2sUtJ5yO7rhuIW_k/edit

Examples of heavier games with streamlined rulebooks—a BGG designers forum discussion:

https://boardgamegeek.com/thread/2558470/examples-streamlined-rulebooks-heavier-games