I just read the tip from

http://webdesign.about.com/cs/css/qt/tipcssmargins.htm

that you can zero out default borders, margins and padding with this. which seemed pretty good idea. I tried but for some reason it didn't work, IE still has its default border around image links, h4 tags has its margins. I'm not sure if it works in html5 documents..

HTML Code:
html, body {
  margin: 0px;
  padding: 0px;
  border: 0px;
}