Oh dear God. "Don't start a sentence with a conjunction"?!
There is a whole blog of PROFESSIONAL Linguists hammering, over and over, the point that such rules ("avoid the passive", "don't split infintives") are complete and utter crap by any reasonable standard other than a curmudgeon's whim. Usually the curmudgeon in question being one of Strunk or White.
They also have other interesting stuff. You can find them here
The whole point of this is lost if you keep it a secret.