F.B. Purity does a great job of making Facebook more tolerable
If you must use Facebook, then the browser extension F.B. Purity does a very good job of turning it into a more tolerable experience. In addition to blocking ads, suggested posts and sponsored posts (which is still working perfectly as of right now), it has numerous other useful features that help to filter out crap from your News Feed and enhance and/or simplify the Facebook user interface. It also offers additional functionality like friend tracking, so you can get a notification when someone unfriends you.
Another similar option is Social Fixer, but it's been somewhat gimped after they gave in to legal threats from Facebook a while ago and removed some of the features. I haven't used this one for a while, but it might still be useful.