lady, correct me if I am wrong but I think you and I have the "same" family - my eldest is a boy of 4 1/2, my middle child is a daughter (nearly 3) amd my baby is a boy of 20 or so months.
When people see me out with the three of them they always say "my goodness, how do you cope?" I usually smile and say "I don't"!
Seriously, sometimes it is just mayhem in our house.
Can I offer some practical suggestions which have helped me? Bear with me if I am stating the bleeding obvious
Every night , set out EVERYTHING you need for the morning - a small pile of clothes for each child ( as well as a pile for you), packed lunches ready in the fridge, the breakfast stuff all ready etc.
I have recently managed to tear myself out of bed half an hour earlier than I strictly need to and it has helped a lot - I find getting out of bed torture at any time so it is not really any worse to do it a little earlier and it is wonderful to sit in peace with a cup of coffee for ten minutes.
Here is a tip which has saved me hours - always put your keys in the same place every day! Likewise children's shoes.
If you are at home all day with the kids, DON'T tidy up at all until , say ,half an hour before your dh gets in.There is no point in tidying up again and again all day long. Get your kids to help you tidy up. No dinner till the toys are put away! The only reason I think you should tidy up at all is it is very nice to have some degree of order once the kids are in bed and you get an hour to yourself ( watching eastenders or whatever)
You asked about getting them to eat in the evenings.
Can I suggest you move teatime half an hour later so they are more likely to be hungry? (with no snacks or drinks in the afternoon). This has worked wonders getting our three to eat proper (though limited in range ) dinners in the evening. Give them tiny portions .Just good healthy stuff, not neccessarily a "dinner" the way we think of it. Fruit and cheese, bread and butter,cold meat, raw carrot, frozen peas or corn, whatever. And no puddings or extras or alternatives if they don't eat what you put in front of them (if they all get eating disorders you can blame me)
Our evening routine is teatime, bath, and bed, all within the space of just over an hour,which means any flakeys anyone (including their mother) wants to have over tea or bed are all compressed into a short space of time and generally ingnored.