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It was good until I have had this new website where Google plus has got an active account but under different id and the site has got its analytics and webmaster tools account set under another id.  If I simply verify the site, will it be able to track authorship and social signals?

Your opinions, help and guidance will be appreciated

I'd prefer likes on specific post I'd share. Note that each inner page/post authority is counted when an overall domain authority is questioned. Additionally, mentions, shares and comments matters more than just likes. If your content is great, it'd be more fruitful if more and more people share the post.

Additional to what Matt replied, you can make great use of your blog to answer such questions. It'd help not only build trust but also convert the readers into possible customers. Depending upon the quality and value, you may even receive natural hares and backlinks without asking.

I agree with danford. A website developer needs no big details about post penguin strategy. You should speak to an SEO consultant, get proper site architecture and details (or fix your existing ones so you don't lose your ranks) and then instruct your website designer accordingly. You'd need to guide them with proper H and Image tags etc.

Now when you're getting a website makeover, you may consider important conversion aspects too. I believe these should be the questions you ask from a designer/developer

1- Is it good to switch your existing CMS? if yes, which one and why? If no, how can they help working with existing CMS. Ask if they can help you on SEO aspects related to development.

2- Do the create a wireframe first in order to take care of website conversion and NOT just cute looks and feel?

3- Inquire about site speed and loading.. It should load quick and unfiormly, not in pieces.

4- Ask about their process, time and cost estimates (prefer a cost breakdown and documentation if your site is big)

Of course these question should start with looking at their portfolio.

There should be different questions you should ask from an SEO company though.

Hope this helps.

If you're talking about content, then it may come into any form (images, graphics, videos) as long as it serves your site visitors' purpose and add value. Just take care of unique value proposition, focused page and relevancy.

Homepage can have no content at all to 300 words minimum. Note that search engines would rank you on the basis of alt tag, title tag and H tags too if done properly. All you need to answer is

Who you are

What you do

How your visitor is benefited

These 3 questions can be answered with any form of content.

The category page can have a 50-100 words precise and clean description of category using engaging words and style. make great use of H and alt tags.

Product page can have 100-500 words depending upon what you are selling and how much words it need to convince your visitor with value. May be features, how it works, tips etc.

On product pages, user generated reviews may add an extra edge in terms of content and credibility.

Hope this helps.