As a non-fiction author, I find myself reading a lot of non-leisure material for research--books, old newspapers, and that sort of thing. A few years ago I noticed that my leisure reading was on the decline, so I decided to delete all of the social media, news, and gaming apps from my phone, and replace them with an e-reader app.
Now, when I have a few idle moments away from my computer, instead of checking something like reddit, I read a few pages from a book. It's great, I recommend it! I'm back to reading a couple of novels per month, and I don't have so much of that queasy wasted-time feeling that social media tends to give me. I've even learned how to pause reading mid-paragraph and resume easily later; that part took some practice.