I see this way too much. When you're on in public, put your damn phone away. Take the earphones out. Just be a person for a little while, all that stuff will be there later.

Waiting to cross a road? Eating lunch? Drinking coffee? Walking somewhere? Literally in any situation, just be content with living in that moment. Smile and wave at people, maybe even do something crazy like ask somebody what they've been doing today.

Put the technology away and be a person. I know it's super hard to sit there without listening to music, browsing reddit, etc., but just do it.