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Using targeted keyword multiple times on a page;is opposed of being natural.

When you access an URL that begins with https , the data is encrypted (is not plain text). Is more secure; usually is used for payment pages.

Any dofollow link count, so links from forums counts too. Also, there are penalties for artificial link building like Google Pinguin. Try to get natural links too.

Use a CDN service to serve images.

Google Penguin refers to penalize sites that has spammy links, with the same anchor text over and over again.

A diverse link profile is good. Submit to quality directories.

Put relevant titles, get good ratings and reviews. Also, if you get higher number of views you are displayed better in YouTube results.

The Planet offers good servers and they have good support.

I have used www.authorize.net and they have good commissions.

My PR updated too, a blog has PR3 from PR1.

These days, you can submit sitemap directly to Google (via Google Webmaster Tools).

FTP allow you to transfer files between your local computer and a server on the Internet.
FileZilla is good FTP software.

Depends what you want to do with that IP. You have programming knowledge or use a CMS like Wordpress?

The PHP code that get IP address is:

If you target a specific country is helps to have a domain with that extension.

I use CDN from MaxCDN, page load speed has increased.

Cloaking means that you show to Googlebot other content taht you show to regular users.

Linux is better and is cheap (in fact is free). I use it with WHM/CPanel for an easiest administration.

I am using Atjeu hosting, they have affordable prices.

Usually people posting on forums have a link in signature with their site. Links helps to improve rankings.

Build links from sites written in Spanish language. If they have .es is better.