You can make utilities for yourself where you can put all your calculations and worksheets. This will reduce repetitive work to a great extent and help you save time for some other productive and constructive work. Apart from them, there are a countless number of other ways to use spreadsheet such as planning your tax, investment, cash flows, managing phone numbers and contact details and the like.
Now, you need to go ahead and total these items. You are on the right track if you spend less than you make. This gives you extra money each month. Now, if you are indebted to the credit card companies, you want to take this extra money and apply it towards paying off your total owed. If you are not in debt, you can go ahead and squeeze a few unnecessary purchases into your personal finances budget, but there are still benefits to saving the money.