Reduce the cost of each ride on mass transit by paying in advance for a weekly or monthly transit pass. When you’re just getting used to a new commute, it can be hard to gauge whether you can save by essentially buying transit fares in bulk. But if you take two trips per day (to work and back) during the week, plus any weekend trips, you’re likely to save 20–30 percent for each trip overall.
Take the Los Angeles DASH bus, for one example. The city’s transit department has a calculator to show how much you’d save with a monthly pass for unlimited rides. It only costs 50 cents each time you ride the bus, but if you ride twice per day almost every day of the month, you could buy a monthly pass for $18 and save $120 per year.