iOS: If you're like me, you head out to run errands only to get back home and realise there's at least one thing you forgot to do. If you're an iPhone user, you can set up a location-based reminder that comes in handy for situations like this. How-to Geek breaks down the functionality, but it's really pretty simple. From the Reminders app, add a new reminder, then hit the detail icon. This is where you can assign specifics for the task, including "Remind me at a location". This feature gives you the option to set a specific location, but you can also select "getting in the car" or "getting out of the car". If your phone connects to your car via Bluetooth, you'll get that reminder whenever your phone is paired.
This is also useful for stuff you might forget to do when you get home. If you have a bad habit of leaving your keys in the door, for example, you could set a reminder not to do that when you're getting out of the car. If you leave the garage door open, set a reminder to shut it when you get in the car. Check it off your list, then you won't have to worry about remembering whether or not you did it.
Again, it's a pretty simple option, but a useful one. For more detail check out the full instructions at the link below.