Here are a few tips that I hope help.
Plan to leave 15 minutes before you actually have to be out the door and if your lucky, you'll be on time.
If your not starting work until September, you'll have lots of time to practice.
Try setting out cloths the night before. Be flexable, if your toddler wants to wear her purple pants with her green polka dot shirt that doesn't match. So be it.
Set the table for breakfast the night before.
Keep a bag, box etc in the car with extra cloths, jackets, non perishable snacks. That way when you a mile down the road and realize you've forgotten something, you won't have to turn back.
Turn tea time into work time. When I would get together with my girlfriend on the weekend for some girl talk, during our talks we would cut up veggies, or divide large packages of dry snack foods (like goldfish) into small ziplock bags or storage containers.
I had one shelf on the refrigerator door that was for sippy cups. I would fill many cups at a time. This way the kids could serve themselves or I could grab one on the way out the door.
Do dinner prep the night before or on the weekends. If you're going to have some extra income, you may want to consider buying some prepared food (shredded cheese, cut up veggies, etc) or an actual cooked meal available at most larger grocery stores.
Don't be afraid to ask for help.
Consider hiring a mother's helper. Is there a young girl or boy in your neighborhood that could help watch/play with the kids while your preparing dinner or doing chores?
Some quick meals that we enjoy -
Tacos - you can cook up the meat a day or two in advance and just heat it up, you can also cut up the veggies in advance
Stir fry - everything can be cut up in advance, start cooking the rice first, by the time everything else is cooked the rice should be done.
Breakfast - forget the eggs and bacon - instead of just cold cereal, try the following especially with some fruit -instant oatmeal, bagels and cream cheese, toast with peanut butter, yogurt.
Is hubby a morning person? In my case hubby takes care of the morning duties, I do the evening duties.
Most importantly, try to discover what works best for your entire family as a whole.
Congratulations and good luck.