I read a lot of blogs about UI, usability testing & talking to customers. I admit that we haven't been good at it, but in the last two days we've learned a ton. Here's how we set it up:

1. Have users share their screen via Skype
2. They have 2 objectives: signup & add a course
3. There's no right or wrong answer
4. As you fill in the fields and navigate through the site, talk out loud (i.e, "I'm typing my name in, now I'm going to search for a course")

Things I thought were easy and intuitive actually make no sense. What's more interesting is that each user had similiar problems on certain pages.