[rattray]

One thing I found really helpful on Android is using "Extreme Battery Saver Mode" basically all the time.

It turns off ~all apps fully, and makes you click through a dialog to enter one - and then click again after 5 minutes or the app turns off again.

The downside is that you don't get notifications from messaging apps, which can be a problem (or amazing) depending on your situation. Whitelisting messaging apps would defeat the battery-saving purpose, of course.