The phrase "a good idea sometimes" is correct and usable in written English.
It can be used to express that something may be beneficial or appropriate at certain times but not always.
Example: "Taking a break from work can be a good idea sometimes, especially when you're feeling overwhelmed."
Alternatives: "occasionally a wise choice" or "sometimes beneficial."
I know what my blood pressure is now, and I know what it kind of should be, and I know occasionally when it's gone above that, and I kind of have a good idea sometimes of why it's gone above - like if I've put weight on or whatever, it seems to go higher or whatever, and if I've lost weight, then it kind of goes down again.
Glitter or sparkles can get in your eyes, or make tiny scratches on your eyelids - even if you only wear them once or twice, so these aren't a good idea sometimes though.
This is a small feature but a very good idea: sometimes context is exactly how you remember to use words and phrases in a foreign language correctly.
A customer might bring you a good idea, but sometimes at first you only see the practical problems which make it difficult to implement.
She had a good idea, but sometimes everything doesn't go well for you in the business world.
Going head on is never a good idea, but sometimes you get forced into a head on situation.
However, in a Congress where good ideas sometimes go to die, there was a fatal flaw in the legislation it would have allowed these same big banks to own and control the clearinghouses that are being created to police them.
It's about the creative edge where many of us like to recharge our batteries from office politics and family quibbles, that place where the frontier meets the ocean and we care more about the silence where good ideas sometimes go to be born.
Individuals with good ideas, sometimes with links to industry, will engage with Clinical Trials Units and other external organisations.
These don't necessarily have to be good ideas — sometimes, seeing ideas that you definitely shouldn't use can inspire you to think up ideas that you definitely should use.
Calling for a reservation, especially for a place on the deck on weekends, is a good idea, as large parties sometimes book that entire space.
