Another tangible thing (that is underestimated) is educating ourselves. I finished Shane Claiborne's Irresistible Revolution.
The book really made me think. I ended up agreeing with him much more than I thought I would. And while I don't agree with EVERYTHING he says (but heck, who agrees with anyone 100% of the time right?), I definitely recommend the book because it's a thinker. It makes you self-examine and want to let go of things that you didn't realize you even needed to (but you do). It also really brought out my compassionate side, and helped me to see "the least of these" in a different way. The way Jesus sees them. Now, I have no plans to live in the inner-city and join a "community", there is still a lot of applicable stuff that I took away from the book. So go read it! (If you want to borrow it, just let me know)
Now I am moving on to Gary Haugen's 'Just Courage'.
Again, I'm only just starting the book, so it's too early too review, but so far so good! Will add more when I get further. In fact, if anybody else wants to read it with me....we can get together and talk about it! And if you don't live near me, we can chat via blogs and e-mails. So what are you waiting for? Go get the book!