Make a Backup
If you're expecting a delivery tomorrow or if you plan to pickup an iPhone 7 in store soon, now would be a great time to make a backup of your files.
When you get your new iPhone 7 or iPhone 7 Plus it's going to be a blank slate. If you plan to start from scratch, skip this tip. If you're looking to bring all of your contacts, photos, and other files over to your new phone, you'll want to make a backup.
Backing up the files on your old iPhone could take awhile depending on how much you have stored. Backing up a near-full 64GB iPhone 6s took about 30 or so minutes for us though your mileage will vary.
Making a backup now will allow you to quickly make the transition from your old iPhone to your new iPhone 7 or iPhone 7 Plus.
And if you're planning on trading in an old iPhone at a retail location, it'll help you get in and out of the store with your new iPhone 7.