Here's what's cool:

1 saying 'thank you' 
2 apologizing when wrong
3 showing up on time
4 being nice to strangers
5 listening without interrupting
6 admitting you were wrong
7 following your dreams
8 being a mentor
9 learning and using people's names
10 holding doors open

Janis Miyasaki 
My list 1) Smile more 2) be kind to yourself 3) be kind to others 4) give people the benefit of the doubt 5) nurture your passions 6) be generous 7) be grateful for today 8) be grateful to the people around you