How about reacting your first date if that is possible
Take a picnic supper and watch the sun go down and the star come up
Or do it the other way around
Go to a romantic movie and then write each other love letters
Have someone watch the kids and have a dinner by candlelight at home
If your kids are old enough let them by your cook and wait staff for a romantic dinner
take a short day trip
take a class together and after the class go out for a meal
go to a paint your own pottery place and each make something for the other
Take a old couple you marrage you would like yours to be life and ask for their tips
have a picture took of the two of you.
I hope this help you some.