If you are experienced with spreadsheets you can also add extra features such as the ability to create graphs from the data you entered. Graphs make it easy to get a quick view of your current financial situation. The graphs will allow you to easily spot trends and areas that are in need of attention in order to keep you on budget.
The great thing about personal budgeting spreadsheets is they can easily be modified to fit your budget. You can enter the exact categories you use monthly for your income and your expenses. These categories can be really detailed such as having individual credit cards listed by name or they can be broad such as having one group named credit cards for all your credit card bills.