Have you tried curation? Use a content curation tool like DrumUp - https://drumup.io/ but make sure to maintain a balance between original and curated content. Otherwise take a road trip or an extended holiday. It'll certainly set the creative wheels in motion.
DrumUp - https://drumup.io/ easily one of the best tools I've used. It's a social media manager and content marketing app that mines web content in real time to recommend to your audience, reducing your Facebook, LinkedIn and Twitter management time.
Use a content manager. I got tired of excel too and switched to a content marketing tool instead. I'm not sure if it'll help but checkout DrumUp - https://drumup.io/. It gives me content recommendations so figured I'd just leave it here
Content curation is really useful when you've hit a roadblock and can't seem to get the creative juices to flow. Just make sure there is a balance between original and curated content. You might want to check out DrumUp - https://drumup.io/. It's a content marketing and curation tool which is really handy (personal experience).
Curate content by giving your take on the subject with context. You should also keep in mind to mix the original content with curated content. An easy tool which can help you with content curation is Drumup (https://drumup.io/).