Hi K.,
I am a stay at home mom with one son. I have no idea what it would be like to have a second but my husband and I are thinking about it. One of my biggest worries is wether or not I will be able to handle the stress.
I wanted to share what has worked for me so far, maybe it will be useful to you.
1) Whenever I am about to explode, my son goes to daycare. It's a luxury worth having. I work part time (teach one class a semester, one day a week) and it's money that keeps my sanity. This lets me take time to rest, exercise, whatever I need to get energy back and catch up with the little things that I can't seem to get done any other way.
2) I get one morning off when my husband takes our son and I can either go to my yoga class, sleep in, read or whatever I want.
3) talk to other moms. Get together for a walk, play date, any excuse is a good one. Play dates are great because the kids are less demanding when they have someone to play with.
4) Do yoga. It's my thing. It keeps me centered and so far my son is happy to sit by and crawl around me when I do it. Other moms run, swim, etc... I feel that my body needs the exercise to get stronger and my mind needs it so I can sleep better at night.
5) Do whatever you need to do to get some sleep. Maybe if you have a friend that also has kids and you can trade time, share a babysitter and while the kids play, get some sleep.
6) MOST IMPORTANT: learn to let the little things slide and do them later. This includes laundry, dishes - what I call revolving chores that by their nature are never done. Sometimes you just need to let it go, laugh about it and remember that your sanity and your kids' happiness are more important than a clean house or getting somewhere on time. I am still working on this one...
Good luck, and I hope this helps.
A.