Even if you are not a professional web developer and can only just cut and paste enough HTML to make a web page not totally suck these 30 tips are something that you should read. Lot’s of good practical advice, stuff like closing your tags and if you use inline styles an asteroid will strike you dead (not really but inline styles are still a bad idea). Read it and remember it the next time you are working on your magnum opus ‘Hello World’ page.