With Siri and iPhone Reminders I’ve discovered an easy way to maintain a shopping list of stuff to buy when I’m next at my local supermarket.

Here’s how it works. By default, Siri knows about your Home and Work addresses, but you can tell it about the supermarket too. Google the address of your local supermarket.
Go into your iPhone Contacts app and add the address of the supermarket. In my case I create an entry called “Asda”.

Now I can tell Siri: Remind me to buy pasta when I get to Asda.

As soon as I walk into Asda I get my reminder pinging me. Works every time.

Note: you can manually create shopping reminders too by selecting the “Asda” (or whatever) contact in the “At Location” field.