You are brave to take baby out for errands at the end of a long day....and you still have dinner, bath and bed to go! :)
When I had my second I refused to go anywhere after nap time! So my day completely revolves around naps, meals, and bath/bed time. If we eat at my parents for dinner, I give them a bath there and we leave at their normal bedtime so they can fall asleep in the car and we put them straight to bed...There are many social situations I avoid and decline b/c it would be past the kids bedtime, even events for the kids...the local library had a touch-a-truck event at 6:30 pm so I fed them early, bathed them, put them in their pjs and then took them, just so they could still have a 7:30 bedtime...
So yeah, right now, your life is scheduled and routined for both you and your child's sake...which leaves very little time for anything else. I grocery shop at night after bed or the occasional afternoon that hubby is home early, I have discovered the joys of internet shopping this year (walmart.com loves me, ), I also started "stocking up" on things like toiletries,tp, staple food items so I have fewer trips out and am less likely to accidently run out.
But some days, like when you need to buy an outfit for a picture, you just have to go and do and maybe call hubby to met for dinner out, and let baby fall asleep w/o a bath and pjs that night!