You won't be lost if you have a Glympse. I just came across this app a few minutes ago and I already love it. It is simple and it works without any complicated setups. This is what it does. As soon as it is installed, you can view your own location on a Google map. Next, click "Send Glympse", and you will be able to send a link to this map to anyone's email or smartphone. The receiver will be able to view your location continuously on a PC or on a smartphone. You will need to set an expiry time for viewing your location; anything up to 4 hours. It works even when your phone is in sleep mode. The other person can still see where you are.
This application is very useful if you are going to a place where there is a tendency to get lost in the crowd, such as a market or a fun fair. It can be used to let your loved ones keep track of your movements when you are traveling somewhere. For example, if I am driving to Adelaide my family can see where I am at any one time. I only wish that the Glympse creator had thought of providing a more flexible expiry period. For instance, if I am away from home for several days, I wouldn't want to keep sending out a Glympse message every 4 hours. And for anyone with the Alzheimer's disease, someone will always be able to find out where the patient has wandered to.