9 Things to Do Before Installing Android 8.1 Oreo

Look Into the Downgrade Process

You don't have to do this but we recommend getting familiar with the Android downgrade process before you install a new Android update. That way if something does go wrong, and you can't find a manual fix, you can drop down with ease.

If Android 8.1 starts causing problems on your device and you can't seem to fix those problems, you might try downgrading to an older version of Android in an effort to improve performance. 

There are a bunch of resources out there but this guide on the Nexus Help Forums is one of the best we've come across. 

Downgrading might come in handy if and when you start to experience Android 8.1 problems.