Reddit mentions of Epic Content Marketing: How to Tell a Different Story, Break through the Clutter, and Win More Customers by Marketing Less

Epic content marketing might help you look at content from your blog to provide you with alternate methods of presenting it (infographics, videos, slide share presentations).

I liked the ideas found in Blue Ocean Strategy towards the beginning, but for whatever reason was never able to go past chapter 5.

Books and the blog of Seth Godin or alternatively Basecamp (formerly known as 37 signals) are usually fun, quick reads.

Blogs by KISSMetrics, Zendesk, Hubspot, and following Growth Hackers threads are all good options too.

What does your SaaS do?

Lastly, something that can provide guidance is taking an hour or two to draw your message map. Essentially, it's a list on one side of your target audience at each stage of purchase, what you want them to takeaway from your message and what are the main barriers to them understanding that message.

Best of luck!

Edits: Was on phone; added links for the lazy.

If you're looking for a book, I really like Epic Content Marketing.

For general guides to Digital Marketing, I highly recommend Neil Patel's Quicksprout. Just read everything he has there, especially his Guides in the right sidebar. Extremely thorough, very well-researched, and lots of references to other sources.

Good luck!

Everyone says Gary Vee but truthfully you need to find multiple sources.

Personally I stopped looking at social media as an answer and more like a targeted bullhorn for my content.

I'd recommend you start with here.