This is the nicest write-up about Markdown I’ve seen.
It’s based on the way people write email, which makes it
very easy to pick up. And at every turn, the syntax makes
sense. Things look like what they mean, and this is no
coincidence. In fact, I’ve gotten better at “formatting” my
emails since I started using Markdown. For me, it’s better
to use the same conventions in all my writing rather than
try to remember a bunch of systems.