If you don’t know what a farmer’s walk is or why it’s good for you, I recommend that you read about it on t-nation.com. For the TL;DR people out here, doing a farmer’s walk is the art of walking while carrying something heavy in both hands for a certain distance, the kind of thing a typical farmer do everyday (and how often do you see an out of shape farmer?). The reason it’s good for you is that it makes use of every muscle group of your body and works your cardio at the same time.
I bet you’re a fan of “carrying all the grocery bags in one trip”, so why not taking it to a new level by using what we learned in that article about the farmer’s walk?
Instead of carrying the bags only from your car to your house/apartment, go to the grocery store on foot, buy some food (the heavier the better ;)) and walk back to where you live. It’s like killing 3 birds with one stone, but instead of being a bird murderer, you get food, a good walk and you get a full body workout at the same time!
That’s pretty much it, you can experiment with the weight, distance and speed to see what fits you best, just don’t forget to switch hands from time to time if you happen to carry bags of unevenly distributed weight which is often the case with grocery bags. And don’t forget your reusable bags to do your workout in an eco-friendly way!