Successful athletes get their motivation from a kind of physical delight in making their bodies perform, in pushing themselves past their own physical limits. Similarly, to be a hacker you have to get a basic thrill from solving problems, sharpening your skills, and exercising your intelligence.
When you dont look good, it changes the way you carry yourself and interact with other people. Use this to your advantage by taking care of your personal appearance. In most cases, significant improvements can be made by bathing and shaving frequently, wearing clean clothes, and being cognizant of the latest styles.
If you want to be a hacker, keep reading. If you want to be a cracker, go read the alt.2600 newsgroup and get ready to do five to ten in the slammer after finding out you aren't as smart as you think you are.
This doesnt mean you need to spend a lot on clothes. One great rule to follow is spend twice as much, buy half as much. Rather than buying a bunch of cheap clothes, buy half as many select, high quality items. To behave like a hacker, you have to believe that the thinking time of other hackers is precious so much so that it's almost a moral duty for you to share information, solve problems and then give the solutions away just so other hackers can solve new problems instead of having to perpetually re-address old ones.
Note that since this document changes occasionally, they may be out of date to varying degrees. The five-dots-in-nine-squares diagram that decorates this document is called a glider. It is a simple pattern with some surprising properties in a mathematical simulation called Life that has fascinated hackers for many years.