First see where you're wasting the most
For me it was coffee, stopping for coffee every morning on the way to work. At one point I programmed the coffeemaker and we'd both take a cup to work, but we never finished a pot and that was wasting coffee, going out every morning was easier. The plastic re-usable cups keep the costs and waste down further. As a bonus, there is no further temptation to eat high calorie foods, I know exactly what is in the coffee.
The Dreaded "B" word
I say sort of because many people take cash back on a check and never track where that goes, many people have too big a miscellaneous category or don't bother with categories on every transaction. Do yourself a favor and account for every expenditure.
If you don't tell your money where to go -- You'll wonder where it went.
Get Plastic Surgery
I know some of you will tell me you pay the balance every month. Did you know studies show that people spend more when using a credit card and have less recollection of specific prices.
Those points are a gimmick. Of course the credit card companies are a business in the business of making money. You will spend more using a credit card over cash, the additional spending more than covers the merchant's costs to the card issuer to be able to accept the card. You would be far better off using cash and giving up the points.
I am a big fan of using the spendvelopes to help me stick to my budget for certain items that I purchase in a store.
If you haven't read it yet I highly recommend The Total Money Makeover by Dave Ramsey.
Getting on track with your finances starts with wasting less money. We've already covered many ways to do that in the first 6 months of the year by cutting utility costs and buying less "stuff". The stress relief you'll feel when you have no debt payments and a rainy day fund is immense.