Wal-Mart thinks so, and I think they have a point.
Now, with its strategy of low prices all the time back in place, Duke [the CEO] said making Wal-Mart a "one-stop shopping stop" is a critical response to dealing with the rising price of fuel.
What other trips are not necessary? Not taking unnecessary trips strikes back at our Middle Eastern and South American energy lords. Why should we put a cent in a despot's pocket, when we can avoid it? Let's put it in our own.
I also like the typical Wal-Mart customer's strategy, as described in the CNN article to which I've linked (by the way, thanks Instapundit): Shop at the beginning of the month and stock up until next month.
And, of course (of course!), there's the internet shopping option.