Write for a reason, and know why you write. Whether your daily updates concern your work life, your hobbies, or your innermost feelings, write passionately about things that matter.
To an artist, the smallest grace note and the tiniest flourish may be matters of great importance. Show us the details, teach us why they matter. People are fascinated by detail and enthralled by passion; explain to us why it matters to you, and no detail is too small, no technical question too arcane.
Bad personal sites bore us by telling us about trivial events and casual encounters about which we have no reason to care. Don�t tell us what happened: tell us why it matters. Don�t tell us your opinion: tell us why the question is important.
If you don't really care, don't write. If you are a student and everybody is talking about exams and papers and you simply don't care, let it be. If your job bores you, it will bore us. (If you despise your job with a rich, enduring passion, that's another thing entirely!) Write for yourself; you are, in the end, your most important reader.
If your site belongs to a product, a project, or an enterprise, you must still find a way to represent its passion and excitement. If you do not understand why your product is compelling or comprehend the beauty of your enterprise, find the reason or find a new writer.
Write honestly. Don't hide, and don't stop short. When writing about things that matter, you may be tempted to flee to safe, familiar havens: the familiar, the sentimental, the fashionable. Try to find the strength to be honest, to avoid starting the journey with passion and ending it with someone else�s tired formula. The work may be hard, it may be embarrassing, but it will be true -- and it will be you, not a tired formula or an empty design. And if you can be satisfied with that tired formula, you aren't writing for a reason.
Never, for any consideration, publish a statement you know to be false.
Though you write with passion about things that matter greatly, always remember that it's a big world, filled with people and stories. Don't expect the world to stop and listen. Never expect any individual (or, worse, any quantity of individuals) to read your work, for they may have other things to do. At the same time, steel yourself to expect the unexpected visitor and the uninvited guest; the most unlikely people may read your work. Your mother, who never uses a computer, may read your intimate weblog one day in the library. To be honest with the world, you may need to be honest with your mother; if you cannot face your mother, perhaps you are not ready to write for the world.