Ad Tracking
Settings > Privacy > Advertising > Limit Ad Tracking (turn it on)
Location-Based iAds
Settings > Privacy > Location Services > System Services > Location-Based iAds
Apple Music
Settings > Music > Show Apple Music
Predictive Text
Settings > General > Keyboard > Predictive
Lowercase keys on the keyboard
Settings > General > Accessibility > Keyboard > Show Lowercase Keys
Siri suggestions
Settings > General > Spotlight Search > Siri Suggestions
Frequently Visited Sites in Safari
Settings > Safari > Frequently Visited Sites
Battery Percentage
Settings > Battery > Battery Percentage
Almost all notifications
Settings > Notifications
Background App Refresh for almost all apps
Settings > General > Background App Refresh