How many times have you set off somewhere with the intention of picking something up or calling in somewhere. Whether it's getting some milk or dropping off a birthday card for someone, we've all forgotten at some point. One of the smartest features on the iPhone is the ability to set location based reminders. Basically you can set your iPhone to remind you to do  a specific task when you arrive or leave a certain location. It's really easy to set up a location based reminder and it really will save you a lot of time in the long run.