1. Keep love in your heart and never give up believing in the goodness of human beings. 2. Live a life of integrity and decency. 3. Take care of your health. 4. Respect the earth and its living things. 4. Laugh. Have fun. Fuck lots and lots. We were given our bodies and our sensuality to enjoy! 5. Find as an occupation something you love so much you'd do it for free. I guess that's more than one. Sorry
Newborn children will not remember much you teach them, better wait a few years to offer them solid advice.
sleep on your back (oh, and avoid tobacco smoke) http://en.wikipedia.org/wiki/Sudden_infant_death_syndrome
One piece of advice only? It'd have to be "Live the way you choose to live, not the way others tell you to live"