Affordable SEO - Top Google Placement

I have little time for the SEO of my maternity website and would like to increase my Google page rank of about page 8 to page 1 or 2 for at least 5 or more major keyword terms. I'm open to ideas as to how you could help me improve the seo of my site. I currently use Twitter, Facebook and paid advetising. Looking for someone who can write articles, do link exchanges and blog writing etc. Work suit anyone with interest in fashion or baby maternity/nursing clothing. Australian site