J.S.
In the old days, those women lived on farms. The kids each had 4 toys (if they were lucky) and they all worked out on the farm during the day. The kids had chores, and were outside screwing around instead of inside watching TV. Also, as someone else pointed out, families were closer and available to help out. There was usually a "spinster" aunt who helped! :)
You have four young children. I have 3 (age 5, almost 4 and almost 2) and most days I feel like pulling my hair out at some point. This is what I suggest.
1. Get someone to watch your kids for 1 weekend (or two days during the weekend - if you are nursing the baby - keep them with you). During that time, do a serious clean of your home. PURGE about 1/2 of the toys. Our kids (mine included) have too much stuff. I swear it multiplies by itself under the bed at night.
2. Once you've gotten rid of stuff (donate - do not attempt a garage sale - that's a hideous amount of work), then pick another weekend and enlist more help with your kids and then organize and clean.
3. Get your laundry on a schedule. My brother (3 kids - 2 working parents) swears by the once a week laundry. I like to do mine every day. Both of us agree that getting it done includes putting it away. I do my best to put kid clothes away DAILY. My own is less strict.
4. Make yourself a calendar for monthly/weekly chores. Once they are on a calendar, it's easier to make time for them. Change sheets on Saturdays (that way you have help getting it done and back on the beds from your husband). Post your calendar some place visible and follow it.
5. Cooking. My husbands general philosophy for everything complicated is KISS - Keep It Simple Stupid :) He tells me that all the time (joking of course!). Meals can be healthy and still easy. Fresh vegi's, fresh fruit, protein (hard boiled eggs or cheese) and pasta/rice/bread is a well rounded meal on a hectic day in my house. Try to cook some things ahead on the weekend and freeze. Also, a baked chicken is very easy and you can use the leftovers for easy lunches or dinners. Bake two at the same time.
Make a schedule for TV. Have your older kids pick the things they like to watch most. Put it on the calendar as part of your day. We have a "not everyday" tv schedule. My kids love Dinosaur Train, so on TV Days that's what time of day they get to watch. Other videos, are extra and have to be earned with good behavior.
Don't forget to take a 1/2 hour for yourself once and a while. You are busy, over touched, stressed out, and tired. Take a breath, and try to enjoy them. I know it's hard. I've been really working on enjoying my kids more, and stressing less for about the last year. I've found much joy that I was missing by not having a schedule and letting things get out of control.
One more thing, something that almost always works to bring us down a notch around here is to call for a "BOOK BREAK!". My kids love it. They each pick a book, we sit down (in the mess if necessary) and read a few books. Everyone gets some attention, cuddle time, and it calms us all down. I find it very effective for changing course of a bad moment :)
Good luck!
J.