There is no specific standard for honoring the dead on All Souls Day, but you can do so like most cultures do.
Offering a prayer, holding out novenas and masses, visiting graveyards, lighting candles, and offering flowers are common customs to honor the dead on All Souls Day.
But another innovative way is to use QR codes from a QR code generator, just like the ideas shared above. You can also follow these ideas to honor your departed loved ones.