After writing this post, it was requested that I share our budgeting spreadsheet templates, so I created blank templates, which can be accessed through Google docs at the following links:
Monthly Budget Template
Charitable Donations Template
Please feel free to share these links and use the templates as you'd like. Here are a few quick instructions:
Monthly budget: You fill in your individual monthly budget in Line C1. Enter each purchase in a new row, and the new remaining budget will appear in column D. If you have a credit, make sure you enter the value in Column C as a negative number. It sounds complicated, but it really isn't.
Charitable Donations: Enter your annual charity budget in C1. Enter each donation as a separate line, and the remaining budget will appear in column D.
Let me know if you have any questions!