Learning serenity without stress

Oh...don't get upset! You may hear this remark often. But maybe people are right, maybe it's time to calm down a bit and not get upset about everything. The neighbour who is always making noise, or the tailgater behind us who waves at us with his headlight flasher. Everyone knows them, but do you really have an impact on these events? Probably more on your blood pressure, which rises as a result...