I paid for a yearly AppBlock subscription. I tried locking up my phone (literally, in a drawer with a lock), uninstalling almost everything, and just plain old willpower, but I'm the type that needs to see money go out in order to motivate myself sometimes. It's been a few months and working well for me. In fact I only pick up my phone to see if I have any whatsapp/line notifications.

Other than that it's just an occasional google maps usage. I never browse anymore. My home PC has reddit/youtube DNS'd to 127.0.0.1. This isn't impermeable but it creates small gaps of boredom where I'm more likely to go for a walk or pick up a kettlebell. Adding up small wins is where the ship starts to turn around