'Wherever you may be, there you are', 'You will never do anything good or worthwhile with your life, now go prove me wrong son' and 'You push me, I punch you. You punch me, I wound you. You wound me, I kill you' are the most memorable words of wisdom my Dad gave me.
And before anyone asks, yes, he was sober and perfectly sane.
EDIT: Other good ones I remember,'Now is important' and 'Treat everyone on the road like an idiot, one day you will be right'.