By the time I got to #9, helpfully labelled a "conversion tip," I became convinced that this wasn't about good user interface, this was about how to sell more stuff. Which... I mean, there's lots of people in the world who want to sell stuff, so there's an audience. But it's not a good name for what they're trying to do.
Bah, I thought this was going to be something universal but it is just the 523rd site about how to sell things to people by designing your generic website with "conversion tactics" and psychological manipulation.
It's important to note that a lot of these tips aren't good UI for the user, but for the business itself when attempting to manipulate the user. I wish it would have been labeled more appropriately.
Some of the advice seems to be oriented for a US-like culture (e.g. be direct). Other cultures might have different conventions, I think.
I found it ironic that the site itself doesn't follow the very good advice it's giving. A case of "Do as I say not as I do" I suppose.