Do your grocery shopping online, have it delivered Friday evening, keep weekends supermarket-free.
Find a group of working mums with similar interests to you who can you can learn off and support each other.
Often networking events etc. are in the evenings which make it tricky for a lot of working mums to attend. Find the areas that interest you and if decent high profile stuff doesn’t exist, start your own group.
Better still, do it at lunchtime or after the school drop off in the morning so it doesn’t eat into the work day or mess up your childcare arrangements.
A friend and I have done just this and there seems to be a genuine and growing need for more networking opportunities for working mums.
Have a back up childcare plan for when the kids (or you) are ill.