GOOG411  is great for saving money when you need phone numbers and/or addresses. You just call 1-800-GOOG-411 (free) instead of 411 (usually $1.50 and up per call). Especially useful for cellphone users. I programed the number in my phone and named it "info." Check out their video on it -- funny. Another free service from Google.
from Lifehacker's Top 10 Telephone Tricks