The standard way is to use the Reminders app. But we can use faster ways to add a reminder. Follow these three handy tips to quickly add reminders.This way, you can remember to do important things later.
This is for the iPhone and iPad

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Tip 1 – Use a Widget
One of the quickest ways to add a Reminder on an iPhone or iPad is by using the Reminders Widget, which you can add to your Today Screen
First, access your Today View by swiping from left to right on the first page of your Home Screen.. Next, scroll to the bottom and tap Edit. Now, tap Reminders in the widget list to add it.
You might also want to move the Reminders Widget toward the top of your Today View list so you can access it quickly. Once you have done this, just tap it once to expand it, and then tap New Reminder to add one. Refer to below image:

Tip 2 – Use Siri
First, launch Siri by pressing and holding the Home or side button, or by saying “Hey Siri”, then say something like, “Remind me to visit CVS Pharmacy at 121st and Elm in Broken Arrow tomorrow at 10:00 am”.
Siri will confirm and show the reminder you just set up on the screen.
If you specify a location related to your home address, such as, “Remind me to check front porch for packages when I get home”, Siri will track your location via GPS and show the reminder when you arrive at your home. This Reminder feature uses the Home Address you have set for your Contacts card. See below image:

Tip 3 – Use the Share Button
For some apps, you can add a Reminder using the Share button (the square button with the upward-pointing arrow).
For example, if you are browsing in Safari and want to read an article later, just tap the Share button on the toolbar. Next, locate Reminders in the Apps list. You might have to tap More and scroll down to find Reminders app.
Now, when you check the Reminder later in the Reminders app, it will include a link to the website. Just tap the link, and you’ll be taken to Safari automatically. See below image:

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