How to get those MP3s you want for free

In order to save some money from MP3 purchases, you can always try to find some other means of getting those MP3s you want for free. Of course not all those techniques are legal, but what did you want? It's for free...

Lifehacker has made a nice post that gives some advise on this area. For example, you can try searching the MP3 you're looking for in the Web. If that doesn't work for you, you can always download the music you want from MySpace. How about borrowing your friends' CDs or using the web? Another possibility is to grab the audio from a video. The quality is not the best but most of the files are audible.

What are your techniques to get MP3s for free?