Troubleshooting! Anna Griffin Continuous Cards Assembly

How to do the cards right the first time before you lose 4-5 cards trying to figure it out. Please note: I love Anna Griffin (my imitation of her at 5:36 was my trying to mimic how her sweet voice sounds to me, and I failed miserably). I love all she does! I'm not making fun of her or pointing out any flaws in her.