This was a comment on the question, but should be an answer. You don't. If you can't afford it, you can check it out of the library. If you want Lisa Mantchev to be able to keep writing so you can read more of her stuff, you buy it so she gets paid for her work.
If you want to be more likely to get more posts like Lisa Matches posts (and more of them from more diverse people), you are reading the right thing, right now. By your silence, you are sending the message that the blog has something to offer you. If you are going to continue this silence, you can't even say so much as “thank you”, because then you start losing credibility. By this action, you will also be undermining the credibility of the people on your friend list who support you on this blog. I'm not saying that you can't be awesome while you're still a student; I'm saying that you have to be awesome no matter how you're financing your education. There are a couple of ways to make money at my blog, and I'm not going to waste your time writing up a long explanation of all their.