If you want someone to join your organization or make a donation, you better make sure they can find their way to a checkout page. Avoid using simple text links that can get lost in a page. A quick example:

Donation page example that uses a text link

A text link like the one above (1) doesn't stand out enough. The "make a donation" link is the most important element of the page. So, why is it tucked away with the background information? Here's a better way:

Donation page example that uses a large button

Now it's extremely clear what I click on if I want to make a donation. And I don't have to read a small paragraph to find the link.