Easy. I take them outside for fresh air and good old-fashioned wholesome exercise, to a field or a park where they can run and run and run, where I don't need to tell them to behave themselves, where I don't have to nag at them about their mess, where I can let them just be free to shout and throw themselves around and get their clothes dirty and kick a ball around and climb trees. Kids have to have an outlet for all of that energy, and if you try to suppress it by expecting them to be calm and quiet all the time you're asking for trouble. Once they've had a good run around, it's much easier to get them to do something constructive and creative and productive at home. And they have more to talk about, because they've actually been outside and done something. And also, having fresh air and exercise energises you as a parent, so you have more patience and can deal with difficult behaviour more effectively and calmly.
I live in a town where there is a shortage of good places for the kids to run around, so we just have to make the best of the spaces we do have. However, we are lucky that at the weekends, if we're prepared to drive, we can get out into the countryside and see forests and lakes and hills. Living in a city must be very different, but I'm sure there are still ways to get children outside and moving.
That's what I do, and it works for us beautifully.