It's very useful advice for drama teachers, especially when working with young children.
It offered little useful advice in the critical early days.
Sometimes you can give useful medical advice over the radio.
Please feel free to add any other useful advice you might have inside this thread!
I have found this useful advice, particularly if one wants to know what a word means in different cultures and groups.
It also gives useful advice to young girls about body image, friend situations and health.
Perhaps we shall have useful advice on the conduct of the war.
However, I got some very useful advice, which helped me later in my profession.
A teacher who has been away on a short course including elements of both these skills, and can therefore give useful general advice.
She usually remains quiet but will give useful advice when called upon.