1. Set up a Far Side RSS feed as described in my blog post, or find somebody else who already has and get in touch to ask them if they’ll share the URL.
2. Use a free service like Blogtrottr, Zapier, IFTTT, FeedRabbit, or even MailChimp to monitor the RSS feed and email you any new entries to appear in it.
Alternatively, or in the meantime, you could suggest it as a feature on the Far Side website.