Expense tracking is important because it helps you understand where all your money goes and will keep you on track with all your bills.
you can find one such expense tracker here. http://www.planabudget.com/budget_download.htm
All you have to do is enter your bills in this excel sheet and at the end of the month you will be able to see how much you spent on unnecessary things. By understanding your expenses, you will have a better understanding of how much you need to save and where to lower the expenses.