We are all deluged with documents, seniors most of all.
With internet documents, my first line of defense is to send them off to Pocket. Pocket is just a holding tank where I can read them later. I keep them there temporarily and delete them after I have read them.
Short permanent notes go straight to Evernote where they are automatically indexed and easy to access later. I use a browser extension that sends them off to Evernote.
Longer documents present more of a problem. I use a similar browser extension which sends them off to Kindle. The extension is called Push to Kindle.
I also use email to send documents to Kindle. In the subject line I type convert for PDF documents. I use dotEPUB to convert to ebook.
This works well for digital manuals and instructions, and everything else. For paper documents I need something else.
If these documents have very tiny type I scan them to my PC using my Brother printer. The printer will convert them to digital text, send them to PC, and magnify the document for easier reading.
I keep track of these documents on the Kindle page for managing content and devices, where I can deliver them to a tablet or phone. I keep a bookmark on my PC browser for that purpose. They will not appear on a device until that Kindle content is synced.
To organize all these documents, I use a Kindle Paperwhite reader. There I can distribute them into Collections by subject. Since the Paperwhite can handle a huge number of documents in its memory without going to the cloud, I keep them all there to access anywhere.
So there is then just one place to go when I am looking for a document, my Kindle Paperwhite. No more going through piles of papers.