I have used Intuit's Quicken program to track my personal finances since leaving school. A few minutes here and there makes the world of difference when it comes to looking after your finances and knowing where you stand.

Based on my great experiences with Quicken, I chose to use QuickBooks when looking for an accounting solution for my small business. I have no regrets in doing so. It's proved to be easy to use yet powerful, allowing me to invoice in the way I want for products and services sold.