E.W.
I do not have any advise on websites or anything to incorporate what you are asking into your day (although I think it is a great questions, and can't wait to hear the response).
Just wanted to share that my daughter was 2 years old when I decided to take her out of daycare and be a SAHM. I thought that she would miss "school" and ask about it, her friends, teachers, etc.. She could have cared less, I have been home now for 9 months and she hasn't asked about her school once.
Some advise from a mom who worked, then went to a SAHM... Do not get mad at yourself when you do not get as much done as you think you will. I constantly beat myself up thinking I was going to have all the time in the world to get things done around the house, hahaha! Then there are the days that I beat myself up because I have done stuff around the house all day and the house looks great, but I haven't played with my daughter. It is ok and you will find a balance, so don't stress about it.
Enjoy the time with your kids and everything else will fall into place. Good luck, and congrad's... You are going to have the best job in the world.