Can you eat meat from a store? I can buy locally produced organic meat. I can also eat meat two times a week, instead of every day.
Produce? I can have a garden, or again, buy local.
Flip on a light switch? I can buy energy efficient light bulbs that use a fraction of the electricity and last for decades.
Electricity? I can install solar panels, or even buy more energy efficient appliances and electric monitors to lessen electric use.
Start your car? This one is easy, I can use a bicycle, live closer to work, use public transport, car pooling, or even invest in a more sustainable form of transport
Lesson? Everything can be improved.