In Argentina, I don't have the luxury of paying by debit card for everything. More often than not, I need cash for a majority of my daily transactions. For the financially organized, tracking cash spending is a chore. It implies I'll waste a lot of precious time waiting for the vendor to write out a receipt and then trying to read the illegible handwriting to manually enter it into my personal finance tracking system when I discover it again. Forget trying to get my husband to do this too!
You can register a new Twitter account (make it private) and then you follow Tweet What You Spend, it follows you back and you complete the registration process. After registration, you track your spending through Tweets. With your mobile phone at the point of purchase, you use your Twitter account to sent the details of your purchase and the service uploads it to your cash journal to be categorized and later imported into whatever personal finance software you use.
Here is the quick tutorial video to get you set up.