Are you an Android user? If so...

For not quite a year now I've been using GreenAlp's "Real Time GPS Tracker" app. It's free and easy to use. What I like about it is that I can set the update interval to it doesn't drain my battery. For my daily commute, I have it set to update my location every 2 minutes, so it only uses the GPS for a few seconds every time minutes, barely touches the battery. At the beginning of May I did a three day, 370 mile tour and set it to update every twenty minutes, worked out perfectly.
http://www.greenalp.com/RealTimeTracker/