Fast app switching is another neat new feature you'll want to try.
Similar to the Windows ALT-TAB feature, we can now double tap the recent apps button on Android. It pulls up recent apps and automatically switches to the last app you were using. Before we had to manually select from the list of running apps, but now it toggles through them for us. It's a small change, but huge for your workflow.
Try it now if you're on any version of Android N. Tap the recent apps button, then hit it again. You'll now be on your last used app, ready to go. In early versions, we could tap as much as we wanted and flip through all recent apps, but now it's limited to one.