>Find the abstract elsewhere and then use the DOI to find it on Sci-Hub?

That's pretty much it. Suppose you want to read a paper on memes, so you search scholar.google.com for "memes". Then let's say you find https://www.jbe-platform.com/content/journals/10.1075/etc.10... (I just chose one at random).

Going to the link gives you just the abstract. This one happens to have a full text link, but suppose it didn't. Then you'd go to your favorite sci-hub site (e.g. sci-hub.tw) and paste the URL into the "enter URL..." field, and the paper shows up.

For me, this website is usually working, with relatively good search http://gen.lib.rus.ec/scimag/ Though, I often search on scholar and then c/p the title to scihub. Also, http://z-lib.org has a good search function, both for books and articles.

I actually quite like using the telegram bot. I just send it a URL or title or whatever and it replies with a PDF.

Oh, what's the name of the bot? I like using Sci-hub a lot but it gets pretty slow sometimes, the bot would be much more convenient.

Perhaps this one https://telegram.me/scihubot

That's the one, yep.

The few times I've needed it due my uni not having access to a paper using the DOI worked - there is also reddit.com/r/scholar

Yes, pretty much. I find an interesting paper, note its DOI, go to sci-hub to download it. Never tried to search on sci-hub itself.