I'm editing a biography in which the author, who isn't a native English speaker, stated the following:
I started a business at the age of 21 and had no idea what were the most important skills I should work on.
This naturally didn't sound correct and my kneejerk reaction was WH-movement:
I started a business at the age of 21 and had no idea what the most important skills I should work on were.
Not the most elegant sentence, but barring adding extra words or removing existing words, isn't this grammatically sound? Maybe I've read it so many times that I've lost objectivity.