Reducing Worry in a Friend, Without Obvious Mention of NLP

Hello,

Does anyone know a good technique for reducing someon else's worry without them knowing I'm ''doing NLP'' on them? A friend of mine is in a state of anxiety and worry, and I'd like to give them some techniques to be calmer and to stop the worry.

Its difficult because she's not the kind of person who responds to things like visualisation and submodalities, or understanding the positive intention of worry. Any ideas would be appreciated?

Thanks