i use Excel checklist i make, along with The Card Collector software and TCDB to make sure my #'s add up.... its a little time consuming, but find it works pretty well for me. I enter a few packs at a time, then check my numbers between all 3 and if something is off, i can fix it quickly and go from there. I havent quite gotten caught up with all 3 being at same place yet, because didnt start that when i began entering cards here.... had been using The Card Collector software forever, so most of my collection was already there when i began using the Site to track my collection, and then started using Excel for checklist since paper and pencil just wasnt cutting it any longer....