What should I plug my system into?

I just got my first high-end system, and without further ado plugged it all into a $5 power strip I got from the supermarket. As I read more, however, I see that one can spend thousands of dollars on line conditioners and other hi-tech gear designed to "clean" the power supply and otherwise work wonders when plugging in. I had no idea this stuff existed. At any rate, I suspect that, whether or not my ears can detect a difference in sound, it might be worthwhile using something a lttle better than a $5 power strip. Your suggestions would be much-appreciated.