I've figured out a surprisingly effective form of calming oneself down and/or boosting your spirit; even if just temporarily.
Simply take some Blu-Tack, roll it into a ball and press your thumb firmly into it, leaving the mark of your thumb-print.
I find It is an easy way to affirm your importance in the world - whilst your thumb-print may be subtle or not easy to see, be assured that it is there. As is your imprint on the world. You are much more important you will ever imagine.
Smile; time should never be wasted.