A giant stack of Black Friday purchases also means a giant stack of receipts. To tame the paper trail, try Lemon. Snap a photo of a receipt with your smartphone camera and the app will digitize and store the purchase record. It will also slice and dice the data, offering up reports on your shopping habits. A free, ad-supported version is available for all major smartphone platforms: Android, iPhone, Windows and BlackBerry.

A version without ads, priced at $9.99 per month, supports multiple users and offers more advanced reporting tools.

By Laurie Segall @CNNMoneyTech - Last updated November 23 2011: 12:23 PM ET
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Secrets of extreme Black Friday shoppers

For these shoppers, Black Friday means serious business -- and savings. Here's their plan of attack