Avoid using coin phones. They generally cost more in the long run. Limit all phone calls to five minutes or less. Check your directory for phone numbers. Use your radio for time and weather information instead of your phone.
Charges increase when an operator is involved.
Phone during discount rate periods - evening, night and weekend hours. Call when holiday rates are in effect, generally all day for legal holidays such as Christmas, New Year's Day, Thanksgiving, etc. They are toll-free also. Check your directory for such numbers before dialing. Plan your phone calls in advance, especially when dialing long distance.