In workplaces, shops, medical practices, hospitals, etc. that you visit regularly, try to be nice and smiling with the various "support" persons you interact with (receptionists, secretaries, security guards, cashiers, nurses, etc.) It is not about creating relationship, just be very polite and respectful (unless, of course, you have a good reason not to be). In that world you never know when some unexpected situation can develop, and when it happens it can really help to have the various persons in the viscinity that identify you as a "nice person".
Do not use headphones while riding a bike.
Don't let anyone talk you into giving them money. People asking for money are always manipulative (I mean people who actually engage in conversation with you, not the random homeless person begging in the street or the subway). If you want to give money to someone or an organization that is OK of course, but always make sure this is your decision.
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ouroboros
A bit obsessed with vocabulary, semantics and using the right words. Sorry if it is a concern. It's the way I think, I am not hair-splitting or attacking you.