Donation of the Month
Maybe you've tried a pear-of-the-month or wine-of-the-month club. The same idea can apply to charities. First off, you'll probably end up giving more since you can spread the cost over time. Secondly, it helps the organization plan its budget better, since it can rely on your donation coming in regularly. Lastly, when you make those monthly payments, they usually go directly to the organization's bank, so the processing costs can be less than that of a one-time check—a tiny savings, but multiplied by a lot of people, it's not so tiny at all.