How well you score as a teacher of baby sign will be reflected directly in how well your baby develops as a signer. This is an excellent case of a better teacher making a better student. For example, how consistent you are with signing will have a dramatic effect on the results you experience.
Being consistent means that you sign each time you say a word out loud. It also means that when you introduce a sign, you keep doing it. Dropping signs, or saying a word without signing it, will teach your baby that signing is optional. Thus, your baby learns that signing is optional. Your baby will also become confused about how signing is used. Just by doing the signs each and every time, teaches your baby about how signing should be done.
Being consistent with signs is one of the most important rules to teaching your baby to sign.