I've sometimes considered going back to a flip phone as a daily driver. I've settled instead for treating the smartphone as a tool rather than a lifestyle. If I'm not using it for navigation, location gets turned off. I don't do discussion forums on it, general web surfing is right out, and anything from Facebook got ripped out when I bought it (with one thing that couldn't be removed getting disabled).

A side benefit is that I get 2-3 days' life out of my battery and still have about 30% left when I plug it in.