I miss running!

So I have sadly fallen off the wagon with my running lately. Last week I spent all my free time and spare energy prepping for Norah's first birthday and this week Alex started preschool so it's been a bit stressful. Instead of me being able to have my MWF after work running time, now I get to pick Alex up from school and have some Mommy-son time which I love.... but I miss running. The only time I am able to run is after I put the kids to bed.... which is that last thing I want to be doing because I have a bunch of other things to get done before bed. So, I have a problem and I need help! How can I find more time in my day to do everything I want to do???????