Here they are, from Career of Happiness, ch. 3. You’ll have to read the chapter to see his full explanations.
1 Be realistic
2 Do no disrupt the routine of marriage
3 Make peace
4 Never say the word “get”
5 Be loyal
6 Never say “I hate you”
7 Love your neighbor as yourself
8 Display your regard for your mate
9 Maintain your appearance
10 Do not be a tyrant