I heard Matt Cutts on a video say that meta description is not a ranking factor anymore. But have the same meta description repeat many times throughout your site can sound like a spam site.

I personally would write different meta description. If it's only a couple hundred, just hack it out and get it over with. If it's in the thousands, well you have a problem.

Please take the time to read Chapter 7. http://www.seomoz.org/beginners-guide-to-seo

You need to grow the popularity of your website by building links. Also, you may to buy the MOZCON 2012 video and watch Paddy Moogan's "35 Ways to Get Links" .

I recommend you read chapter 7 http://www.seomoz.org/beginners-guide-to-seo

Are those 21 micro sites selling the same things? I rank for many highly competitive keywords and to tell you the truth, I haven't built any links in 6 months! Create GREAT content and people will naturally link to you and give you Facebook likes.

I'm not 100% sure how to answer your question, but an .htaccess 301 might work.

/example.html/  example.html

Try that to see if it works.

I second Zeph!

Pick your country: http://www.google.com/analytics/partners/index.html

OR ask Avinash here: http://www.marketmotive.com/internet-marketing-training-and-certification-signup?top=certification&topic=WebAnalytics

I took his course and it was awesome!

Make your homepage the subject of your whole site.

Look at my site (I always use it as an example). Home page is about shipping. Categories are about types of shipping. The landing pages are for shipping to specific countries.

If I were marketing your site, I would stick to "Luxury Real Estate in Dallas" and possibly make category pages for different cities.