I use two things to help keep us organized. The first is the Happy Everything Agenda. To me, there's not magic in a specific agenda. You find one that you like and has the components that you need and want. For me, it has to be cute, it has to have month and week views and most importantly it needs to not cost me a million dollars. I think the Happy Everything Agenda meets those needs for me. I need to be able to write it down by hand and have it out before (as apposed to just on my phone, but I'll get there too in a minute).
The second part of my system is using an app called "Cozi" on my phone. I use the free version which runs ads and doesn't include some things that the full version offers, but it is enough for me. The main reason I like this app is that you have 1 login name for your family, but you can login from multiple devises, so Kyle and I can keep the same calendar on our separate phones. So after I write things in my agenda, I add them to the Cozi app.