Useless... 'I before E except after C', oh, as in weight and height.
Don't split infinitives.... To boldly go is actually a masterful constuction thar means something more than to go boldly.
Don't start a sentence with 'And'.   H.G. Wells 'History of the World' begins with the huble 'and'.
Don't finish a sentence with a preposition....this is something up with which we should not put.

   And most of the content of so called grammar lessons.