What worked for us was figuring out a budget, then using cash to make sure we stuck to the budget. For us, it looks like this:
$240/month -- groceries
$40/month -- personal allowance (for each of us, so $80/month) to buy whatever we want, including meals at work, clothing, etc.
$40/month -- pets (we budgeted to save up for annual vet visits)
$40/month -- house (this includes cleaning supplies, light bulbs, storage bins, etc.)
$40/month -- fun money (date night!)
Everything is in even $20 amounts because that's how it comes out of the ATM.

Using cash made me very aware of how much I actually am spending on things. And guess what, if the grocery envelope is empty, we have to make do until the next month. This might mean scraping change out of the jar on the dresser to buy rice, beans and pasta, but it works. We used this method to help us pay off all our credit card debts, make a downpayment on a house, and start paying down our student loans.
So I say put the plastic in a drawer, and use cash. It will help you really see where the money goes.