A member of my household is taking a long-term maintenance medication that costs about $1/day. I just found out that a generic version is available. Generic version costs about $0.12/day.
Called the Dr., got it switched to generic, and also signed up for home delivery (free). For as long as the medication is needed, we'll be saving $320/year, and we don't have to drive to the pharmacy anymore.
15 minutes of effort just saved our family ~1.5 days of living expenses per year. I would have had to increase the 'stache by ~$7,500 to buy 1.5 days/year. I'm not sure where this ranks on the scale of badassity, but I'm feeling pretty good about it.