It’s best to start building your cardbox on a system where you’ve already built up a quiz history, because NZ and NZM will give you credit for words that you seem to know well, planting them deeper in the cardbox. If you’ve never done quizzes before, everything you add to the cardbox is going to land in Cardbox 0 and be due immediately.  If you’re just starting out with a new NZ or NZM installation, be sure to sync your data with your habitual NZ or NZM installation first, to bring that quiz history up to date in both places, and, for the love of all that is good and holy, please be careful not to sync a new and virtually empty mobile cardbox/quiz-stats database over any older desktop database that you wanted to keep — read the warnings! For information about data synchronization, see [[Data Synchronization in NASPA Zyzzyva and NASPA Zyzzyva Mobile]] and the related help text in NZ and NZM.