--convert-links: convert links to work offline ex. ./ instead of /
--page-requisites: make sure to download js and css
--adjust-extension: append missing extensions (mostly for html)
WARC
If I'm crawling a site for an offline backup I probably need a zim file. Wget can't output a zim file but it can output a warc file which can be converted to a zim file using warc2zim
--warc-file=filename: enables warc export, standard output will also happen
Cross domain
--span-hosts: crawl cross domain links
--domains: make sure you only crawl the domains you want to (don't want to accidentally crawl the whole internet)