Even if you tell them "Thank You" and they dismiss it with a wave of the hand, never cease to tell them thank you whenever they show you some kindness. When you do this consistently, you will always receive mercy and kindness from those around you, even from complete strangers.
Never cease to say thank you to those that support you, when you do this, you are building your own success.
Keep Striving, Keep Believing, Never Give-Up. Winners Don't Quit, and Quitters Don't Win.