There are no rules.
My "daily" reading - is usually a 1 card draw, once every couple of days in the evening - using my Tarot App.
And most of the time I lean towards reading up about the card, and seeing if any of it is related to my day.
I never do daily draws in the morning - because then I find myself "hanging on" to my interpretation to "see if it will happen" - and that just makes the day get silly
Sometimes I pick a card from an unfamiliar deck (Tarot Apps again) and read to find out all the interpretations of that card, that I didn't know about - and contemplate that for a while.
Sometimes I'll decide in the morning that I need a Talisman to "set" or "boost" my day.
Then, I'll look through a deck and deliberately choose the card I wish to be my Talisman.
I may carry that card in my bag in an envelope - and look at it every-so-often, or keep
visualising it with the required Talismanic properties.
A bit like carrying a specific crystal in ones pocket for its particular properties.
And sometimes - I may just leaf through a deck because I feel like it - choose a pretty card...
and decide to meditate on it. Either doing some form of "path working' - where I imagine myself walking inside the scenery of the card and meeting the characters. Or just looking at the picture and contemplating the shapes or colours... etc.
A longer than one card draw - might be me saying to my guides (because over the years I have amassed 5 somehow) - "OK you guys - what do you have to say??" - then for each guide, I'll draw a card. The messages when I do this, are often weird and hilarious so it's quite entertaining.
Another one that I do - when I'm feeling out-of-sorts, is ask myself the question - "how to I feel now?" - and pick a card that represents this. Then ask myself - "how would I like to feel now?" - and select a card for this.
Contemplate what I've drawn and try and make sense of whatever emotions come up. Sometimes this results in me formulating an affirmation or solution for myself .
The world is your oyster with your daily draw.