Once things settled down, we got into a routine. I am a very routined sort of person, that helped.
It just takes time if that's the way you want to go.
We eventually settled down into a Breakfast, MT, lunch, AT, Dinner and Bedtime.
I think I was also very lucky as DD and DS2 were very easy going babies, so if we were out, they were happy and content to look around or sleep.
I FF fed DS1, I think that helped me in some way work out what worked with timing.

It's whatever works best for you and your little one, sometimes if she was upset while we were out, I would feed her, that didn't happend very often, so I was very lucky.