What are the two rules for securung money?

From the text:

First, always to do my whole duty regarding making our work known to individuals and organizations; and, second, not to worry about the results. This second rule has been the hardest for me to live up to. When bills are on the eve of falling due, with not a dollar in hand with which to meet them, it is pretty difficult to learn not to worry, although I think I am learning more and more each year that all worry simply consumes, and to no purpose, just so much physical and mental strength that might otherwise be given to effective work.