add social stuff to a wordpress site

I need to add social stuff (like twitter widgets, facebook widgets) and some work to assure that a site that exists can be more seo compliant. the site is working now but it can't do the traffic expected. the scripting language is php and there is need of SEO knowledge. 1) Deliverables include not just the final work but also complete source files as well (so that the employer can modify them in the future). 2) Quality: If you present a sample of your work to the employer, your final deliverables MUST match or exceed that same level of quality. 3) All deliverables will be considered 'work made for hire' under U.S. Copyright law. Employer will receive exclusive and complete copyrights to all work purchased. 3b) No part of the deliverable may contain any [copyright restricted 3rd party components][1] (including GPL, GNU, Copyleft, etc.) unless all copyright ramifications are explained AND AGREED TO by the employer on the site per the worker's 'Worker Legal Agreement'.