user interface and ux

Several times in my experiences with Blackboard, I have accidentally clicked the wrong button. In Blackboard's forum thread editing screen, there are both Save and Submit buttons.
Blackboard Save and Submit

There are three problems with this display:

• Both button terms are ambiguous (Save to what? Submit to for what?)
• These terms are often used interchangeably
• The buttons are right next to each other with no contextual distinction

When I was at WebMD back in the late '90's, I often worked on pieces of the site that were designed by Tog. (If you haven't heard of him, check out his Wikipedia page). I developed a sincere respect for UX engineering because of him.

Today, I was looking for a decent set of UX guidelines to give to people who were struggling to understand why it is important. I found Tog's, and this particular portion of the article really struck me.