You don't. I know I get tired of people telling me: enjoy the kids now, don't wory about all those other things. alas, I am not just a mom. For work out, my good friend has scheduled every Tuesday eening at 6 pm (she goes toa class) and every Saturday afternoon while kids nap as workout time. i work out on Fridays when I only have one kid...but you are working full time. so ge out the Kds Bop CD and have reces (inside on cold days) and you dance with the kids. If you could get 30 minutes in while maybe smaller ones nap in the am. also, get yoga Kids by Giaim. It takes a bit to get used to it and teach the kids, but once done, you can do more complicated yoga moves while they are doing the video. So be a creative PE teacher for 30 to 45 minutes each morning.
I personally am an artist, don't have a day care, but still have a hard time getting creation time in each day. I work all hours of the night which you can not do. Now mine don;t nap, I tell them thay have to play quietly for one hour together or they wil be in their beds sleping by themselves. That works well. It is only an hour. so maybe after the kids leave for the day, your son has to play by himself wuietly for one hour. Put on the timer. What you getd one, you get done. start witht he shared potty room, the day care room, and then schedule one househod task like mopping Mondays, Dusting Tuesdays, windows Wendsdays. and so on. then schedule tie on the weekend..limited to two hours, maybe while naps in afternoon for you to complete the rest of the house like laundry, bed sheets, maintence. Only do what can be done in that time and your hubby helps or watches your son.
then on sunday, schedlue that two hours as couple time. (also schedule S_X for that evening as you should be the most relaxed...I know this is hard but worth it, just lock that door.)
and lastly, join a moms club or other and go out with girl friends once a month. I have two: MOMS Club of Longmont West and Groovy Gals. I created the second with all my riends and they each brought in one friend and now we are 12 and play BUNKO. So I make space for it every two weeks to go out of the house and chill out with gals...and gripe about not getting time to myself.
Lastly, say: this too will pass. I know I hate hearing it too, but it will...one day your kid wil be in school all day and you will be dying to see him. to sum up: create small segmants to accomplish, write it down in a checklist form, plan for a "catch up it" each week in case you ouldn't get it all done, get hubby to comit to scheduled babysitting time for youson and/or to help out, and schedule time to rela by yourself and toghether. Be religious about your schedule for a bit and then it becomes habit and easy.
Oh, and get rid of stuff. Kids really don't need a ton of toys, just good standards like blocks. Make a lot of crafts and do PE time. and get rid of as many horizontal surfaces as you can. I have one side table in each on my room..and that is all i hae to dust...how awesome! It takes no time and my house is stll really nicely decorated.