I understand that from the first 42 letters of Breishis, it is possible to derive the 42-letter name of G-d that is indicated within the Ana Bekoach prayer. Where could find out more about the mathematical formula used to go from the first 42 letters of Breishis to the actual 42-letter name know...

Would one be permitted to water plants or feed pets (as another example), before saying shacharit, or would it be better to say shacharit first?