I just saw these and thought they were interesting.
http://www.nteinc.com/fuses/pdf/auto3.pdf

I bought some of those a few years ago and put them in my Toyota, haven't had any blow yet though so I don't know if they really work 
I should put them in my Samurai, it blows fuses every now and then, and it would help me diagnose problems quickly in the middle of nowhere.