You're doing fine. It takes MANY times before a baby "gets it". Your goal is to have him understand that NO means NO by 18 months or so - though he'll still see what he can get away with!
Don't explain too much. Just tell him "No-No, don't hit" or "No-No, Danger".
Move him away from whatever it is - even if it means putting him on the floor so he can't hit you in the face anymore.
If he goes after it again, repeat the same words as before and then hand him something he CAN hit/pull. Then show him how to hit the new thing and say "Yes-Yes! You can hit this"
Repeat Repeat Repeat and redirect when necessary
at 12:13 PM on Jul. 9, 2008