3. Use Wi-Fi
You may be able to drop your unlimited data and go to a metered amount. That alone will save a lot of money each month. Make sure that you use Wi-Fi whenever possible. The overage charges get exorbitant quickly! Make sure you sign up for (and heed) data warnings as you approach your monthly limit.
Save data by not streaming movies, podcasts and movies unless you are on Wi-Fi and hook into free Wi-Fi at coffee shops, work, and other locations.