I learned recently that you can turn your iPhone black and white. (Sorry for other phone users). Let me say, your phone is so much less appealing when it is in black and white. Notifications don’t elicit the same response in me and it’s wonderful. I’m much more likely to put my phone back down and not interact with it as much when it’s black and white.
How to do this is Settings > General > Accessibility > Accessibility Shortcut > Color Filters.
This means that whenever you triple click the home button you can toggle between black and white and color for your phone.