I am in charge of this blog: blog.affilight.com/.
This blog contains useful articles about SEO optimizations, website promotion, social networks etc.

I have a few questions:

1) Is it worth to add a tag cloud?
2) How can I improve by blog? (Advice and criticism welcomed)
3) Is it a good idea to add some interactive? Like quiz, poll etc.
4) Is design okay, or I should change something?
5) Do you think the bear is cool? Or it is better to choose another character?

Thanks in advance!