Don't forget that there should only be one H1 header, and the other headers should be nested.
This is the <em> tag: emphasis. This line is <strong>.
in odd places?
This is a normal paragraph in a list item. Hopefully it renders normally.
Here is a line break in 1, 2, ...
Don't forget that links can route to anchors in the same page
Main anchor link attributes: href, tabindex, title. If you're link text isn't very descriptive of the destination, then put descriptive text in the title attribute. Another good attribute is accesskey, which allows the user to tab there when pressing [usually] CTRL or ALT + the accesskey.
An invisible link at the top of the page that skips to main content and is ordinarily invisible may be a good idea for screenreaders of your page. See the "Skipping HTML" section of this page.
Pretty much just remember the <table>, <tr> and <td> tags. Table, table row, table data.
<br> <img> <input>, <meta>, <col>
This is a quote. I said this.
This is too blocky even for
for (int counter;1=1;counter++), then type "CTRL-C" output will be something like "integer overflow error"
for writing tags and text and code that are pre -- formatted.
<!--[if IE lte 7]combined with
These form input types are newer HTML5 types and not supported by all browsers, especially < IE 10.