If you want to start doing usability testing I'd recommend getting a copy of Steve Krug's Rocket Surgery Made Easy (http://www.amazon.co.uk/Rocket-Surgery-Made-Easy-yourself/dp...). It will probably take you less than an hour to read and will stop you making the basic mistakes I see folk new to usability testing make.

Rocket Surgery Made Easy

http://www.amazon.com/Rocket-Surgery-Made-Easy-Do-It-Yoursel...

"A decade ago the rise in popularity of Flash steered many web designers down the wrong path. It wasn’t the fault of the technology, but of the people using the technology. The same thing applies to HTML5: just because you can do something doesn't mean you should. I'm all for innovation, but innovation should not be regressive."

Yes. The first job of someone putting up a website new design or redesign is to do usability testing. Can a user who reaches your site by a search engine result or some friendly inbound link accomplish a relevant task upon reaching your site? If not, why not? As Steve Krug says, "this isn't rocket surgery,"

http://www.amazon.com/Rocket-Surgery-Made-Easy-Yourself/dp/0...

and if you aren't investing in making your website usable for users, related to some purpose you had when putting up the website in the first place, you might as well do without having a website.

1. Be clear about the problem you're solving.

2. Watch (in person) real people using your website trying to solve this problem. Many times. Fix the most glaring problems.

This is the best book to learn usability testing, and the only one I would recommend: http://www.amazon.com/Rocket-Surgery-Made-Easy--Yourself/dp/...

For those interested in the topic, I highly recommend this book by Steve Krug http://www.amazon.com/Rocket-Surgery-Made-Easy-Yourself/dp/0...

This app looks like it would work well with Krug's recommendations.