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When you changed the url structure did you also do a redirect?

Did you have many links going to those older urls?

concentrating on new domains +3

adding links from already linked domains +2

adding new pages to my main domain +1

(I do realize that not all domains are created equal)

I'll get to work on that.

Here is enough reading to make your head spin...

share this VS add this

http://www.seomoz.org/q/sharethis-vs-addthis

Integrating personal communication with sharing to increase the shares.

http://www.seomoz.org/blog/how-to-increase-the-odds-of-your-content-going-viral-whiteboard-friday

Add this using conacial links.

http://www.seomoz.org/q/i-just-discovered-something-about-addthis-shares-twitter-and-rel-canonical

EGOL & others talking about add this.

http://www.seomoz.org/q/addthis-widget-tracking-success

I have been doing research on this very same thing in the past few weeks.

I'm more then likely going to go with Add This.

Note;

I JUST discovered this:

I work with photos...

http://www.addthis.com/labs/photo-sharing

I'm going to scream & dance now...

I would love to see some recommendations on good sharing buttons as well.

With the way SEO is trending sharing is gaining importance.

If your super new then you might not exactly know what is good advice or not.

It takes a while to learn how seo works & what is good vs bad advice, it also takes a while to learn how the dynamics of a community forum based site work.

I'm trying my best to read as much as I can to see how the thumbs work on this site compared to others before I go & thumb up some bad advice or manage to be tagged for spamming or some other issue I will learn about next week.

But yes, we all do appreciate the good advice given.

I have been slowly building links via personal/professional networking, press from art shows, blogging, and such.

I work with several non related domains & local blogs & press outlets, it is pretty easy for me to add a few new pages of content along with text links.

Or should I just concentrate on getting links from totally "new" domains that have never linked to me before?

I have a hunch that part of the Google Algo is how long people spend on a page, and lots of big pretty pictures along with text entices people to look at said pretty pictures thus stay on each page longer while reading.

One factor that seems to have quite a bit to do with geographical rankings is the actual popularity of that geographical region.  Larger more metro areas have more people more people searching & are harder to rank in then smaller places with fewer people thus fewer people searching.

I can cobble a site that ranks top 3 for Daly City Photography in a day or so.

Yet if I create the same site for San Francisco Photography.

That will be a much harder set of keywords to rank for since Daly City is so small & has so fewer people using that phrase VS San Francisco.

The same may be true for California VS Utah.