Remembering you are the one shot your kids get at a father.
Remembering your children owe you nothing and you owe them everything.
You chose to bring them into this world.
If they later choose to do for you, that means you've done well - and is a bonus.
Remembering actions speak louder than words.
Remembering what YOUR father did well with you.
Remembering what he did wrong.
Remembering your children see themselves through how you look at them.
And finally, remembering this is the most important thing you'll ever do.
Edit:
One last thing I just remembered that is important to remember:
You'll screw up every once in a while.
Admit it, apologize, forgive yourself, and learn from your mistakes for next time.