Even keeping home phone service, you can still trim some costs each month. You can pay for the basic line, which is usually only about $10/month and use your cell service for all your long distance. If you are used to caller ID at home, you can sign up for call forwarding (usually cheaper than caller ID) and have all your calls forwarded to your cell phone.
Many people subscribe to Internet service and/or TV cable with their phone service. Most providers will bundle these at a lower rate so you should also look into what packages are available and what promotions you can utilize. Revisiting your service plan at the end of a promotional period also typically results in more savings.