Step 2: Pick one day a week that you can get by without the car
Think about what trips could be combined or eliminated. Maybe you could do all your errands on one day. Look into public transit, biking, walking, and carpooling. Try to use that information to figure out a day you can get by without driving. Make commitment to it and stick with it.
If it's not possible for you right now, try to at least complete the drive less guide, and then try this guide again in a few months. Perhaps decide to not drive after you get home from work a couple days a week or work to make only 1 trip to the grocery store a week.