The good news is that as they get older, the changes come less frequently. Brayden has been on a very similar schedule since he was 18 months old. The only difference in sleeping and eating now from then is that bedtime is now 30 minutes later. Does that sound nice? 1 year and 3 months of real consistency? It comes. But then again, at that age also come the discipline issues and such, so it is good the schedule doesn't need to move so you can focus on those things!
About two weeks ago, Kaitlyn's morning naps got shorter (Kaitlyn is 10 months old). Now, I don't want to complain. They went from 2.5 hours to 1.5 hours. Nothing to complain about, but she was waking an hour early for the next feeding. So I did some troubleshooting. I figured she was ready for a longer waketime in the morning.
For some reason, I bumped it up 30 minutes. That really isn't the smartest way to go--but I did it. It was not the answer. The nap went to one hour instead. So I backed it off so we were bumped to 20 minutes longer waketime. Still not the answer. I then did 10 minutes. Nope. So I tried 15. Yes! That did it. It is amazing what a difference those 5 minutes made.
This solution has been confirmed a few times for me. The other morning she and I were playing ball for the first time. She was getting a kick out of it! She was laughing and squealing! I lost track of time and put her down 10 minutes late. A short nap followed.
So again, don't underestimate the power of finding the right timing. If your baby doesn't have obvious sleep cues, it is going to take you some trial and error to find that magic minute.