Pretty much as it says in the title. I haven't really explained myself very well.
Basically, I'm such a massive bloody stress-pot. But I seem to know (or come across) so many people who work incredibly hard and are very successful but still manage to be extremely calm and cool-headed. I'd love to be like them i.e. to go with the flow but also feel in control at the same time. How can I do this? Is there a way? Is it even possible??