We needed a few things from the store the other day - milk and a couple other non-grocery things - so we decided to head to Target, all four of us. Where we are, the milk at Target is a bit more expensive than the milk at the grocery store - and it's also more expensive than the milk at the gas station a few blocks from our house. We buy two gallons at a time and the savings of getting it somewhere other than Target is about $1.
We had to pass the gas station and the grocery store in order to get to Target. We debated the value of convenience - was it worth a dollar to make an extra stop for one of us to run in and get cheaper milk? It certainly isn't worth it at the grocery store - the milk is as far from the front door as it can get, and the lines on the weekends are long. And the person in the car with the kids would probably have to drive in circles in the parking lot to avoid wailing from the backseat. The gas station would probably have been less than a two minute interaction to save that dollar - and two minutes to save $1 is equivalent to earning more than $30 per hour, so that seems like it makes it very worth it.
For some reason the extra stop to save just $1 was a stumbling block in my mind. We'd be walking right by the milk at Target anyway, surely that convenience was worth $1.
But then I switched the question up in my head - would I stop at the gas station if I would actually be handed a dollar with the milk? In the end, it winds up being the exact same exchange, but the idea of stopping to GET a dollar instead of to SAVE a dollar made it a whole lot more palatable to me. I'm going to try to do this kind of thinking in other areas where it could potentially save me money - to think of exchanging convenience as GETTING money (a la working) instead of SAVING money (a la boring).
[In the end, it turns out that Target's milk prices have dropped since I last updated my price book, and now milk costs the same at all three places. I was a little disappointed at not "getting" my dollar, even though I ended up spending the least amount I could on milk AND saved two minutes.]