When you smiled to any bus driver every morning and one remembers you the next week when she saw you running to catch the bus and stopped for you.
When the car was speeding up and you're scared of crossing, or rather wait for the car to cross because the driver might be in a rush, but he still stops his car to let you cross.
When you nod in respect to the trash collector for doing their jobs every single day without fail.
When somebody holds the door for you in front and you're paying it forward to the person behind you.
When it is a narrow road and there's only room for one person to pass, and the other person with the dog waited for you to pass first with a cheery smile.
When you hold the lift for a stranger who was running towards it and he was being super thankful for it, and later found out that he is a visiting partner of the other department in your company.
When you greeted the security guard of the apartment of your friend once and the next month when you came back they gave you a cookie.
When you opened every single drawer in the pantry and somebody called behind asking what are you looking for, and it starts a conversation.
When you see an elderly but there was no seat and you offer your hand to hold her steady on the fast moving train.
When you ask a colleague how is she doing and she ignores you, but later apologize for it and tells you that she was preoccupied with her ailing mother at home and thank you that you've showed some concerns.
When your taxi driver is cranky and you ask him why, and you gave your attention although you were exhausted from work, and he started talking about his kids, and wish you well for your career with a grin from ear to ear at the end of your trip.
You'll be surprised on the impact of small acts of sincere graciousness to anybody you meet every single day. Not only it made your day, but you've made somebody else's too.