- The underline is so 1980s.
- As in, there's no place for it.
- Seriously, don't underline text.
- If you need to emphasize something, use bold or italics.
- Never use both, like this.
- All-caps are okay, but only in very small doses.
- If you do this, you'll just look excessively ridiculous.
- And then people will mock you on their blogs.
The author realizes it's a bit of a stretch to include a post on formatting in a series dedicated to boldness. But it's Friday. You understand.