Good idea, to look at where we have missed Mass ourselves!
For me, it’s when I’m tired and have family things to do…my husband isn’t Catholic and if the kids start clamoring not to go too…well it’s hard to be the one voice pushing it. I do it, but it’s HARD. So it helps ME to have Mass be somewhere my kids like going, and where my husband is fairly comfortable, and where parking is easy and where no one will give me the stink eye if I come in late after dealing with the kids losing their shoes on the way to the car, etc.
Oh, and having a later Mass, so that if things with the family really do go crazy, or my non religious extended family wants to do brunch, or whatever, I can do that and still get to Mass by going to the 5:30 Sunday evening Mass. That helps a lot.
Oh, and being welcoming to small children. This is the kind of thing that feeds on itself. If I’m the only one with a squirming baby or toddler feel self conscious and might be less likely to want to attend. But at my parish there are LOTS of small babies and toddlers, and by the end of Mass the walls and back of the church are literally lined with parents who have gotten up and are holding/swaying/walking fussy children. There is a camaraderie with that. Plus, the seniors (who are in fact bussed in from local assisted living facilities) LOVE seeing all the babies. I think having such a great faith formation program and youth program attracts families, so that’s why we get more babies and little ones. There is also a parish school, which I’m sure helps. (we homeschool so don’t utilize it).