even if the work ur doing requires u to check messenger do not do it on ur phone literally make it disappear after abt 10 minutes u will forget the urge to check it bc all u have in front is ur lappy or ipad i did some of the most productive moments recently when i hid my phone very far away from me
go on a walk without your phone, mute the chat, organize an emergency hang with the homies, whatever. you literally just have to fill your mind with something else