One way to help without it costing any money at all is to take advantage of the many Click to Donate sites out there.
Here are some of my favorites:
Free Kibble Kat
The Animal Rescue Site
The Breast Cancer Site
The Hunger Site
The Child Health Site
The Literacy Site
The Rainforest Site
And, do remember that you can help St. John's Center (at no cost to yourself) by using the GoodSearch search engine as much as possible and/or by using GoodShop businesses (there's a ton of them!) when you want to order stuff on line. Just put our full name in the "Charity of your choice" field:
St. John's Center for Spiritual Formation
Then click "Verify". If your computer has cookies enabled, you won't have to type that in again. You can also easily add GoodSearch to your tool bar.
I access the above "click to donate" sites by running a search on them through GoodSearch and that way I raise money for the Center along with donating to the concerns listed above.
It is honestly true that every little bit helps. Since beginning to use GoodSearch and GoodShop about a year and a half ago, we have raised almost $1,000 that way. And we don't have very many people doing it, actually.
I would also recommend that you take a look at the Easy Donations site to find other ways of helping non-profits without it costing any money.