Simon,
Please find attached the official line for managing stress in the workplace. It's a pretty good document raised by the HSE, there is a lot of other source data on the HSE website.
In truth 'stress management' is very difficult at organisational level as one persons floor is another persons ceiling.
The main thing you can do is look at the signs & educate peers to recognise signs in each other (note the signs which are not usually evident):
e.g. lethargy, confusion, lack of direction, indecisiveness, higher alcohol consumption, errors, procrastination, headaches, insomnia, anxiety, poor immune system, absenteeism, aggression.
In terms of dealing with stress, the biggest challenge is recognising it, to quote a previous production manager "I never get stressed, I just shout at people!"
On an individual level to get rid of stress many of the simple things are the most effective e.g. making a few of the decisions you've been putting off, talking to a trusted friend or colleague, going to the gym, improving diet, planning some quality time with family & self (and making it happen), get help at work to cover workload.
Hope there’s a few good pointers here, anyway I off home to kick the dog