It is important to set some time aside for yourself without interruptions, and also to have a good night's sleep.
We spend all day feeding our brain information, so when it comes time to turn it off, you should do the same thing to your phone too.
Consider setting your phone on Do Not Disturb particularly later in the evening and overnight to avoid email and Google Classroom notifications.
- Limit interruptions with Do Not Disturb on Android
- Use Do Not Disturb on your iPhone, iPad and iPod touch