My favorite tool is Spyfu. That enables me to keep eyes on the competitors.
I think less than 40% is excellent. You should target that as I am also having 70% and more but still not penalized :-)
Well it happen several times but I think you should re write your site's title and meta tags and make it keyword centralized then you'll see that...
It is best to put Alt tag for each image. This way you can get your images indexed in Google.
For regular updates regarding Google check http://googlewebmastercentral.blogspot.com frequently.
You can use either Google Webmasters or search link:www.mysite.com for exact back links information..
That's normal because weekend are off and business related sites will feel decrease in traffic and sales.
Just make sure you have unique and quality content on your site and you are not involved in any of Black Hat SEO technique.
This problem is due to programming end. You can consult your developer team and they will rectify that.
Yes that it is. That's all you have to do...
Yes Google count them and it doesn't have a negative impact over search engine rankings.
I agree with that, You need to add a permanent redirection(301) and after that your PR will be carried on..
Separate names with a comma.
