The phrase "useful idea for" is correct and usable in written English.
It is typically used to introduce a suggestion or recommendation that can be helpful in a particular situation. Example: "Here are some useful ideas for organizing your closet and maximizing space."
You either think Mr Rupert Murdoch may have had a useful idea for his Times – or you excoriate him as per usual.
They also have foster care for some older, sicker people - a useful idea for families that can't cope or aren't around.
Though it has few adherents today, the steady state theory is credited as having been a useful idea for the development of modern cosmological thought as it stimulated much work in the field.
This result provides a useful idea for the improvement of GP-1 production in 5 L bench fermentor through optimizing aeration and agitation.
"I worry about getting stuck in traffic and watching the time tick away but otherwise I think this will be a really useful idea for city centre living," he added.
These data have provided some useful ideas for changes to influence potentially inappropriate use of those medicines, and also demonstrated that such comparisons can be done between Nova Scotia and Queensland.
We are offering a few useful ideas for the script.
She offered useful ideas for permanently ending the patenting scam and for collecting royalties.
The process not only gathered useful ideas for further revision, but helped to build a community of support and interest around the stories.
Of course there is the model for a perfect marketing strategy in the Golden Ticket, with the Television Room providing some other useful ideas for FMCGs (fast moving consumer goods in the jargon).
While your Taming corporate power series offered some useful ideas for reining in the power of corporations, it largely failed to confront the fact that our government and politics has become so corrupted by corporate power that such reforms are highly unlikely.
