Not everyone can easily track their expenses, even with the help of technology. I keep a receipts organizer in my purse and separate my cash receipts from my debit card receipts
This has allowed me to really go through my expenses and track where the money is going. Not only that, but it keeps my purse nice and neat, instead of constantly looking through the purse, and wondering what the receipt is for. At the end of the day or the week, I gather these and track.