Refresh External RSS Feeds More Often
Changes how long WordPress caches feeds fetched from other sites for the RSS widget and feed shortcodes, which is 12 hours by default.
Snippet Library
RSS Feeds snippets for WordPress
Snippets for WordPress RSS feeds: add featured images and custom post types, delay publishing to feeds, credit your site on scraped content or turn feeds off. For publishers and podcasters whose readers follow along by feed or email.