First is the Children's Daily Prayer book from Liturgical Training Publications. I have used it for a many years, and it is a simple way to bring daily prayer with your children into your routine.
My second purchase is a daily planner for me from Family-Centered Press. It is specifically Catholic and includes a lot of Catholic content. Different sizes are available and it can be purchased spiral bound or whole-punched. There is also the option of having a menu planner and lesson planner included. I like having a calendar that spans the school year, as I don't like a calendar that starts with January, and splits my school year up.
I also really like having student planners for each of my children. These planners from Pflaum, I have used these for a couple of years now, and they have made a big difference in our schooling. Each of my students has their own planner which I write their lessons in a week or two in advance. The children are then responsible for getting their work done fairly independently, as it is all laid out for them. It is also a good place to leave little notes and other reminders. These planners are Catholic as well, and include information on Saint's days, the liturgical year and Scripture.