Cookies seem to be the majority of the aggregate identity/behavior data, which you can use various rules in the protocol to limit tracking to some extent.
I've found that opting out on a regular basis of the large adverts for a little extra peace of mind.
uBlock/uMatrix Origin, ghostery, duck.com, dns encryption, vpn, ip6.
removing old wireless access points from history/cache and disabling nfc, blutooth advertisement.
removing duplicate/shared passwords from your various authentication providers and using keypass or a secure password scheme that is easy to remember.
Log out manually of various applications such as facebook, google, microsoft, etc.
Contacts list. Clean em' up.
Keep your phone and hands sanitary at all times :)