Well, make sure that, no matter how tired you are, you plan your next day out every night. This saves some time. Also, label everything! From things in the office to things in the kitchen.
Always use the same time to give your kid attention (ie, story time before bed). I always save up all of my errands for one day. That way, I have one incredibly busy day in stead of many rushed days
I´ll invite friends over instead of meeting them for a coffee in the city, this way I don´t have to move too much and bring baby stuff and especially forget a lot of stuff all the time. xx