After I finish my PAO for a deck of cards, I went for it right away.
First time yesterday fresh after done with system 18 minutes
Second time this morning 20 minutes with 5 cards missing and 2 errors
P.S. the How
I use three systems to accomplish this feat.
First I write down PAO I like for each cards and categorized by suit.
Second I memorize all of them PAO by Major system(Phonetic peg list)
Third I use memory palace to memorize the whole deck order.