S.
I would say pacifier. It is usually recommended they be taken away after about one year old because they can affect teeth growth and speaking. After he gets over that, then try the potty and just dive right in. If he understands the potty process, I would get rid of his diapers and do big boy pants all the way. Be prepared for a few accidents, but if you are consistent, he will probably get it down very quickly. My son went in the potty off and on for awhile, and then we decided to just go for it and it only took him about a week to get into the habit. Good Luck!