Since "keywords" are very important in SEO, you should make sure that your website pages are overflowing with repetitive keywords, a practice called "Keyword Stuffing" – you should "stuff" as many keywords as you can into all of your pages.

Writing good and relevant content throughout your website is the most important thing in Search Engine Optimization.

Writing good and relevant content throughout your website should make an immediate difference in your site’s search engine ranking and results.

I should also focus on getting as many links as I can from other sites to my site as it will help in my search engine rankings. Correct?

Yes or No. Consistent blogging on your website will help your SEO.

Advertising on Google via paid "Sponsored Links" can improve your site’s organic search engine ranking and results.

Is your site’s navigation important for good SEO results?

Placing the same content on many different pages of your website makes sure that visitors and search engines find it and is therefore helpful to your SEO results.

Yes or No. Page titles are very important in SEO.

Do you know what a "breadcrumb" is with respect to SEO? How about a "long-tail"?