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This has been gone over several times. Below are some great links to help you with that.
http://moz.com/blog/40-important-local-search-questions-answered
http://www.localseoguide.com/seo-for-businesses-with-multiple-locations-in-the-same-city/
http://www.clickz.com/clickz/column/2283736/local-seo-strategy-for-the-multilocation-marketer
This is an issue there fixing you can keep track of known problems here http://health.moz.com/
Certainly! Here is a great read on content length. But again Quality will be the biggest factor.
That would be achieved with content marketing. Better known as "Guest Blog Posting" Your gonna have a lot more reading to do. The great part is knowledge is power when it comes to marketing.
If you have not read this yet MOZ SEO GUIDE do so as it will get you on the right path. Heck even if you have read it do it again for a nice refresher as this get updated.
Read These on Guest Blog Post
http://moz.com/blog/12-scalable-link-building-tactics http://moz.com/blog/the-ultimate-guide-to-advanced-guest-blogging
This is an issue there fixing you can keep track of known problems here http://health.moz.com/ if you have futher issues you can also email help@moz.com
Yep this has already been posted. But you can read the post here.
http://moz.com/community/q/google-analytics-keeps-poping-up-that-i-need-to-re-authorize#reply_205099
There are so many better ways to do this. What framework are you using? Woo Comm has this feature http://wordpress.org/plugins/woocommerce-video-product-tab/
Footer links should not be overused in fact limit them to only a couple. You want to design and create experiences for the user don't focus so much on google and ranking. If it is of value to have that link for a user then it will not hurt you. Rand has a great article on this http://moz.com/blog/footer-link-optimization-for-search-engines-user-experience
Magento is great and has a plugin perfect for this so you can add that in. http://www.magentocommerce.com/magento-connect/product-video-with-swatch.html
How do you know they are earning good money for those terms?