Shiner is a handy little app to set location based reminders. If you need to remember to pick up tickets when you're near the theatre, just press and hold on the map to set a reminder. When you get within walking distance, you'll get a reminder. If you need to remember to call your friend when you arrive home, just tap the "Locate Me" button and then the plus button. A reminder will be created at your current location for the next time you arrive.