A new phone ships with settings chosen for the store demo, not for daily life. Five minutes in the settings menu makes it faster, more private and easier on the battery.
Turn off unneeded notifications
Go through the notification list and switch off every app that is not a person talking to you. Fewer interruptions also mean fewer wake-ups for the screen, which saves battery.
Review app permissions
Check which apps can see your location, camera and microphone. Set location to "while using the app" for anything that does not need it in the background.
Set up backups and Find My Phone
Turn on automatic backups for photos and contacts, and make sure device tracking is on. If the phone is lost or broken, you will lose the phone, not your memories.
