Take a look at your wardrobe. See if you have enough clothes that are fit for the workplace (shoes and socks/ stockings included). If you don't have the cash right now, it's ok, with some creativity, you can stretch and shuffle things, but do keep a mental list of what you need to buy/ add.
If you have outstanding long term scheduling things. i.e. gyno appt/ dentists appointment/ getting the car inspected, getting the gutters done, getting the lawnmower serviced, do these now, before you start working. The point of doing this is to build in margins so that you don't have to worry about how to work these jobs in when you are juggling school, kids, work and home.
Try your new schedule on for size a week in advance. turn on your crockpot, start your laundry, get the kids off to school, then drive to the workplace. sit and have coffee somewhere if need be. keep yourself out of your house, and take a look at how much time things actually take, and what is proving too hard to do on a daily basis.
Part time retail can be unpredictable (you can be kept on until the next shift arrives, or can be kept long hours for closing up shop etc). Make sure that you have someone in place to mind the kids & house while you are out.
We use a scooba and a roomba, do online shopping, and batch cook. Hubs does laundry, folding, ironing, trash, drycleaning and heavy household cleaning (scrubbing the tub, vacuming the window screens & does windows). We groupon a cleaning service every so often.
Best as you embark on work.
F. B.