I have been using...
"I am always looking for ways to save time. I've been playing a lot of cards recently and noticed that turning cards over takes an awful lot of time. Some people flip cards over this way [first turnover], along the short end, others flip them over this way [second turnover]. I invented an even quicker way that I call the 'double pucker' move. With this move, you can actually turn the cards over inside this little area [pointing to the sandwiched cards]. You hold the cards on the ends and do this double pucker move [buckle the cards to make a cool noise]. This turns over the first ace [reveal first ace], the ace of hearts. I'll show you again, you do the double pucker move [make cool noise]. This turns over the second ace [reveal second ace], the ace of clubs. See how much time that saves [misdirection while turning over]. All I have to do is the double pucker move and the ace of diamonds turns over [reveal third ace]. You wouldn't believe what I have done with all the time I have freed up with this move, I actually brush my teeth! I never had time for that before [misdirection while turning over]. I tried to speed it up even more by just doing a single pucker [count without revealing final ace], but it didn't work. You need to do the full double pucker [reveal the final ace], to flip the ace of spades.
What do you guys do?