You can find do follow locations for your comments with this free search tool:

http://www.inlineseo.com/dofollowdiver/

When I comment, I make them long and thought out as a way to get my name out there.  People like to see debate and controversy, so don't be afraid to comment (politely) about why you disagree with their opinions.

That's my opinion, too, Sebastian.

There is a pretty cool site called Inline SEO that has a do follow comment-finding-tool-thingy.  You can Google it.  It is a pretty useful tool!

Happy Holidays,

Jared

Since it goes to your page, you could edit it, then underneath the profile image it should say, edit thumbnail.

You could put your website along the bottom of the profile pic, then the share button would have your url.

You can also make your site's name clickable under your About Section in Facebook.  Those are for the visitors that enter through Facebook.

I see you're into video, too.  There is a cool optimization channel called VidiSEO you may want to check out if you get a chance.

Great site!

Jared