From a friend I learned to say, for example in shops, “Thanks for you help.”

Thanking people who have helped, whether they are employed to do that or not, is one powerful way to enhance your commitment to being grateful, and being grateful is one way to enhance your being!

Gratitude can help change your outer environment a little but more importantly it enhances the way we read our ‘self’ as well as how we read what we call the ‘world out there’.

This is now opening up to research inquiry. Here is a short version by Robert Emmons, Prof of Psychology at UC Davis in the US;

1 G allows celebration of the present?
2 G Blocks toxic emotions (envy, resentment, regret, depression)
3 G people are more stress-resilient
4 G strengthens social ties and self-worth

Fascinating If you want a bit more from Prof Emmons here is a longer version:

‘Gratitude Works!: The Science and Practice of Saying Thanks [Robert Emmons]

Robert Emmons (Professor of Psychology, UC Davis) explains how gratitude can heal, energize, and change human lives, with reference to recent empirical psychological research.’