What are two the most commonly known best practices to increase crawling effectiveness?

Using linkhubs" and "Interlinking relevant content with each other" are both effective strategies to increase crawling effectiveness. Link hubs, or cornerstone content, act as central points with many internal links pointing to and from them, signaling importance and guiding crawlers deeper into the site. Similarly, interlinking relevant content creates a robust internal link structure, helping search engine spiders discover and index more pages by following these contextual links. "Internal, link-level rel-nofollow" and "Meta robots nofollow" both instruct search engines not to follow links or crawl pages, which would decrease, not increase, crawling effectiveness. "Multiple links to a single URL" is generally redundant and doesn't significantly improve crawling beyond a single, well-placed link.