(These are my bookmarks of sorts)

Common templates:

• https://wiki.archlinux.org/index.php/Template:ic (Inline code)
• https://wiki.archlinux.org/index.php/Template:bc (Block code)
• https://wiki.archlinux.org/index.php/Template:hc (Block code with header)
• https://wiki.archlinux.org/index.php/Template:Pkg (Link to Arch package)
• https://wiki.archlinux.org/index.php/Template:AUR (Link to AUR package)

Formatting guides:

• https://wiki.archlinux.org/index.php/Help:Style/Formatting_and_punctuation
• https://wiki.archlinux.org/index.php/Help:Cheatsheet
• https://wiki.archlinux.org/index.php/Help:Template
• https://www.mediawiki.org/wiki/Help:Formatting

Talk page help:

• https://wiki.archlinux.org/index.php/Help:Discussion
• https://www.mediawiki.org/wiki/Help:Signatures

Other:

• https://wiki.archlinux.org/index.php/Category:Help