My son is pretty "good" in church, but I do have to do at least one of these things in almost every service:
*whisper, "Shhh, listen to the story."
*catch the eye of one of the (many
) people who are fond of him and encourage some peek-a-boo
*let him play with the kneeler cushions or turn the pages of a hymnal
*let him walk back and forth on the floor between pews, or on the pew holding onto the back
*hold him upside down (he really likes that)
*carry him into the side chapel or narthex (entry area at the back) to admire the stained glass; I still can hear from there
*take him outside or into the parish hall if he's really freaking out, but come back as soon as he calms down.
One thing I've found really makes a difference is my attitude. If I let myself feel annoyed and tense and like I'm just dreading the next thing he'll do, HE is much more annoyed and tense and acts almost threatening, like, "Give me constant attention or I'll scream!" But if I think about how much I love sharing church with him and how cute he is, not only can I see a few minor misbehaviors as cute rather than irritating, but those will be the ONLY misbehaviors. Sure, sometimes he acts up because he slept poorly or something, but in general it's up to me to set the tone.
Oh, and it helps to sing a hymn on the way to church to get both of us in the mood.