I think it's actual wrong to call the following "laws" (as a lot of people seem to refer to them). I prefer to think of them as Goals that one should strive towards.

1. Know Yourself.
2. Know your Craft.
3. Learn.
4. Apply knowledge with wisdom.
5. Achieve balance.
6. Keep your words in good order.
7. Keep your thoughts in good order.
8. Celebrate life.
9. Attune with the cycles of the Earth.
10. Breathe and eat correctly.
11. Exercise the body.
12. Meditate.
13. Honour the Goddess and God.