how do you get quality backlinks?

Give people something they need to cite. The links that held up best for us came from a small bit of original data - we surveyed our own customers, wrote up five numbers nobody else had, and journalists and bloggers linked to it for over a year without being asked. Guides that just restate what's already ranking almost never earn anything on their own. Outreach still matters, but it works far better when you're pointing someone at a page that genuinely adds to theirs than when you're asking for a favour.