I am an avid fan of informational products. I buy thousands of dollars every month. With the forecast in place I caught myself spending more then I allocated and was able to just cut back the next month. The great thing about this system is that you are not locked into a specific figure each month but yet you stay within guidelines of where you want to be before the year or quarter finishes.
The best way to set this up is to use a financial program such as Quickbooks or Peachtree. Track all income and expenses using the software. The next step is to print financial statements that track what you have done. Then take the numbers of your financial statements and increase your income by the percentage you want to raise revenue by. Then look at expenses and determine what categories will increase based on the sales increase. This will become your financial projections.