I can't see any reason why you would want to nofollow links to your own social networking pages. They are very much related to your site so why not pass pagerank to them. As Takeshi rightly points out, if you nofollow them then any pagerank they might have got from your home page just evaporates.

This was covered by Matt Cutts in a blog post way back in 2007 but the advice is still the same as Mik has pointed out. Search results could be considered to be thin content and not particularly useful to users so you can understand why Google want to avoid seeing search results in search result pages.  Certainly I block all search results in robots.txt for all out sites.

You may lose 4% of your search traffic in the short term, but in the long term it could mean that you gain far more.

Google will not view translated content as duplicated, rather it will view it as rather spammy since auto translations are far from perfect and the translated content often appears as a very 'broken' version of whatever language you are translating into. Ideally, while I appreciate it can be pricey, do not use autotranslate tools but instead have content translated properly by a professional.

Why not differentiate each of your titles by the actual content so that you include relevant keywords in your titles?

For example if it's a blog about 'Beauty Tips for Women over 40' then make that the title rather than calling the post 'Beauty Industry News - today's date'. Page title is an important ranking factor so make sure that your title gives both the user and search engines a clue of what the content of the blog post actually is.

Definitely agree translating the URLs is a must. Having keywords in your URL can aid your SEO efforts so it makes sense for the keywords to be in the language of the country you are targeting with the translated content.Certainly if I looked at SERPs for an English language search but found the URLs written in a foreign lanaguage I would not click on that search result as it instantly looks rather strange or even spammy.

Why not use a cross-domain canonical whereby you reference the pages on your primary website as the canonical version on your secondary websites, thereby eliminating the duplication.

For example on each page that is duplicate on your secondary website you would add the following to the head to reference the primary pages:

From my own experience, I would say the images that send us the most search traffic are those where the file names have been labelled correctly rather than autogenerated such as 33456789.jpg. I would certainly suggest there is some correlation between filename and search performance, although of course there are other factors to considered. As a recommendation, I'd certainly suggest file names are important although I couldn't put a measure of quite how important. There's certainly no reason I can see for us to stop labelling filenames correctly.

Hi Scott, depending on the volume of new pages being created you could always make use of the 'Fetch as Google' contained in the 'Health' tab facility in your Webmaster account to make sure that your most important new pages are indexed.

Periodically you could add a new sitemap but on a daily or perhaps weekly basis submitting the important pages for indexing through your Webmaster account could be the way to go.

Hi Philip,

By all means add the last part if you wish to give you some consistency in the series, but make sure you append it at the end of the title. One thing to mindful of is not to make the title too long or it may end up being truncated by search engines. This SEOMoz guide should help.

http://www.seomoz.org/learn-seo/title-tag

Using robots.txt is perhaps not the best way of doing it. Using the canonical or a noindex meta tag would likely be best. I think the reasons for this are best summed up in this article which explains, probably better than I could, why robots.txt is not the best way of dealing with duplicate content. Hope this helps.

I asked a similar question a few months back so some of the responses on this Moz thread will be of interest to you. Cheers.