I have recently started using a wonderful site for counting calories, tracking exercise and even water intake.
LiveStrong.com recently merged with The Daily Plate and is free. Is the best tool I have found. They even have a mobile version for my iPhone which came in handy last week while eating out. We were at Applebees and thanks to the foods list I was able to check the calories of the items before I ordered so I could stay within my calorie limit.
There is also another free iPhone app that is similar but is not web based. I use this one also. Lose It can be found at the iTunes Store. You won’t be sorry!