how the h tags should play together
Using h tags (h1, h2, h3, h4, h5, h6) will help your sites get indexed in search engines. google, yahoo! and all the rest recognize h tags as content headings. Whatever you put inside them, especially the h1 tag will get you noticed.
Remember, only one h1 tag per page. You can have as many of the others as you like but they should follow a structure. For example:
h2: oneredpaperclip
h3: barter
h3: blog explosion
h3: Alice Cooper