I am assuming that you mean "rules to live by," or something like that.
Most people in America would probably unreflectively direct you to the Bible. I can't recommend that, outside of about half of the Proverbs and some of Ecclesiastes.
If you're looking for home-spun folsky wisdom, you might check out Jackson Brown's "Life's Little Instruction Book," which was a bestseller back in the early 1990s.
There are of course a huge number of self-help books, all of which basically remind you that you are a valuable human being and that life is worth living. It may be embarrassing to buy such a book, but if this is the sort of thing that you need, then there's no reason to deny it to yourself. Drew Carey (the comedian) admitted on Tom Snyder's show that he pulled himself out of a horrible depression in Las Vegas by reading self-help books.
If you're looking for something more literary, you might look at Baltasar Castiglione's "The Courtier," which is a book written to describe how a courtier (someone who has to flatter a king in order to continue to draw an income) should behave. You might also look at Balthasar Gracian's "A Pocket Mirror For Heroes," which is a collection of aphorisms not entirely unlike Brown's "Life's Little Instruction Book." Gracian's book is conveniently available online.
Finally, I might direct you to Ernst Bloch's "The Principle of Hope," which is a very long work and not as easy to read as the other things I've suggested (Castiglione's book is pretty tough to read, too, I should warn you). Bloch's book comes in three volumes and is a serious philosophical assessment of the conditions in which people cultivate hope, the reasons for their cultivating hope, and the conditions under which it is impossible to continue to hope.
I could also make many suggestions which might lead you to develop an altogether darker set of rules for life, but I get the feeling that that's not what you want. So I hope some of this was useful, and I wish you luck.