Personally, I've found it difficult to keep up the practise (meditating every day), but when I do remember it does improve things. Even as a one-off activity occasionally it is good for introspection, and identifying subconscious sources of stress allowing you to act on them.
[1] NICE aren't perfect, but they do a reasonable job.
See also: http://en.wikipedia.org/wiki/Mindfulness#Clinical_applicatio...
Personally, I've found it difficult to keep up the practise (meditating every day), but when I do remember it does improve things. Even as a one-off activity occasionally it is good for introspection, and identifying subconscious sources of stress allowing you to act on them.
[1] NICE aren't perfect, but they do a reasonable job.