…interesting how, in general, creating a rhyme scheme in advance is more effective and efficient than creating blank verse in advance and fitting the rhyme scheme later.  Until I had tried both methods I would not have guessed this.  Writing the blank verse first is more useful if you have a specific work you wish to adapt to sonnet form; however, writing something brand new is much easier the other way around.  It’s easier–much easier–working an idea into 14 evenly spaced lines that already rhyme, than it is to write fourteen lines of blank verse and modify it to conform to one rhyme scheme or another.