My baby isn't here yet, but my DH and I are planning on taking turns each week being the one mainly looking after the baby (and taking them out of the sanctuary if they're fussy, etc) so that we can each experience Mass more at least every other week. I'm sure that's not entirely realistic of course, but we'll give it a go.
I think I will actually miss being able to focus on the Mass as much, but I firmly believe God called me to be a mommy so I'm just fulfilling his plan by being there and taking care of the gift he gave me. Hopefully that will help me feel better when the time comes.