Social Networking & Google AdWords Specialist

We are an eCommerce business who seek to expand and draw traffic to our website by maximising the use of social networking websites, specifically Facebook and Twitter (both of which we currently have running accounts with though we feel they are not being used to their maximum potential). We also have a Google AdWords account though this too requires a professional input to ensure that the daily budget is spent wisely in order to draw traffic and generate sales on the website. Only looking for freelancers with prior experience in these particular areas. Please provide references or else your bid will not be considered.