I want to encourage you to prayerfully consider supporting PIM financially. I find few charities to be worthwhile, often because their stewardship is poor. However, PIM is exemplary, and I wholeheartedly endorse them without reservation.

One means of doing so is donating credit card points. In running the numbers for Amex, for example, it turns out better to donate points (and lose the tax deduction) than to donate your own money (and keep the tax deduction). I would expect similar results from most any card. The key is the difference in exchange rate (points-for-charity versus points-for-cash/goods). In case there's any confusion, PIM would get a check from the card's bank in exchange for your points. (PIM doesn't get points, but real money.)

You can also set up your credit card to donate your own money (as opposed to points) on a monthly basis. There is a small fee for this, but the convenience of never having to write a check may be worth it to you. Plus, you get to deduct these donations, since it's your money and not unrealized points.

In each case, PIM would simply receive a check from the bank behind the card. You can make these donations anonymously this way, too. In the latter case (donating cash through your card, as opposed to points), the receipt from the bank is sufficient for IRS purposes. PIM need not know who donated it, yet you retain your deduction.