Probably install all the ad and cookie-blocking software, and probably VPN, I think my ISP gives me a static IP that I'm being tracked through it.
AFAIK many online shops also upload their customer information to Facebook, I use the same email for FB and online shops, so there's Zuck making money off that data of mine. But even without using the same email, if many shops have your name/shipping address and they all upload it to FB, FB has a profile of your real name and address [do the shops upload these?] and your online shopping preferences.
In my mind, if I worked for FB, it would be easy to build a shadow profile. Your friends use WhatsApp/FB Messenger on their phones? And they uploaded their address books? Well, Zuck can see there's a friend network with FB/WA accounts who have each others' numbers, and Zuck can see they all have this same phone number for their "not-in-Zuck's-network" friend Eslus (again, if your friends stored your real name in their address book, Zuck also has this information). If there are 4 people known to Zuck, and one of them uploads pics where there's 5 of you, through deduction Zuck's algorithms can see "Ah, the 5th person must be Elsus, according to this time and geo-tag, all 5 were at a Lady Gaga (or whoever) concert, so that means Elsus must also like Lady Gaga's music.".