Quickly enabling Do Not Disturb is a key feature of the iOS Control Center. Apple has added more flexibility over the years, with options to temporarily switch on Do Not Disturb and deactivate it automatically. Do Not Disturb can be set to disable itself after an ongoing Calendar event, when the user leaves a specific location, and more.
There was a time when quickly moving the iOS keyboard cursor was impossible. Back in 2012 the jailbreak tweak SwipeSelection showed iPhone users there was a better way. Apple added its own trackpad mode with the introduction of 3D Touch. The iPhone 6s was first to support the feature, which converts the keyboard into a trackpad for moving the cursor quickly around text.
You can clear your Notification Center by deleting each notification individually, or by using 3D Touch to clear them all at once. To individually delete a notification just tap the x above the notification. To clear Notification Center of all notifications at once use 3D Touch to tap and hold the x above any notification, then tap Clear All Notifications.
There are many ways to quickly access the Notes app. iPad owners with an Apple Pencil can simply touch the pencil to their screen to create a new note. While iPhone and iPod touch users don't have access to this trick, other options make it easy to write notes. iOS can even be configured to allow Notes access from the lock screen.
Punching in your home address (or work or any common destination) in your favorite navigation app grows tiresome after a while, even if it is already there in your recent places. Thankfully both Waze and Google Maps offer shortcuts to directions to your favorite places through a simple 3D Touch and a tap. All you have to do is assign your home, work, etc. locations, then they will be available for quick navigation. Apple Maps, as you would expect, is supposed to have this functionality as well, but as of this writing it is not working properly in iOS 11.3