I have a pretty strict routine at night...
4:30pm I am getting the kids dinner ready.
5pm the kids eat dinner..including DD now. I do the dishes while they eat. They are usually finished by 5:30pm, so they either play or watch the giggle and hoot night hour until it's time for a bath, they like the giggle and hoot goodnight song
6pm bath, all three of them in together, they are usually out by 6:15, so they go and play for a little while.
6:30pm DD goes to bed after a BF
6:45pm stories for DS2 then in bed by 7pm (he no longer has a sleep during the day)
7:00pm story or school book for DS1 and in bed by 7:30pm

We tend to have our dinner either when the kids are in bed or while they are playing after a bath. This is simply due to DH not being home until 7ish most nights. Usually by the time he gets home dinner has either been cooked through the day or everything is chopped and ready to go.
This routine still worked well when DD was a newborn, I think it helped her establish a good night routine as well. If it came to be that she needed feeding while still very little and the boys were having dinner, I would do it in the kitchen sitting on stool while they ate and chatted away to me about their day.

I also have a rule for me...I do not do any housework of any kind (including folding washing) after the kids are in bed. DH and either chat, have a glass of wine, watch TV together or I go to bed early and read a book. Or of course I play on BB