Your business plan is complete and you are in the process of putting you plan into action... and whether it is a product or service you want to launch there is no possible way that you can or should do everything alone...for obvious reasons.
So from graphic designers, copywriting, public relations and marketing, fundraising and web design there will be a multitude of tasks that you should outsource to professionals who actually know what they are doing .... making sure you have the proper team should not be an issue.
Websites like Craigslist allow you to post classifieds online for everyone to see. I myself, use Craigslist at times for apartment searches and maybe to laugh at random personal ads (don't judge me). But the problem with Craigslist, other than the killer, is that there's no exclusivity, there's no way of knowing if people you meet are honest and skilled, and, it's just plain creepy sometimes.
For large projects I prefer to use notable gig-posting sites like Elance.com to post items that you need to get done pertaining to your business.
Elance.com makes sure that all of its freelancers take prerequisite "exams" to ensure they have the proper skillset needed to complete jobs they apply for.
And for all of my Freelance friends out there, Elance.com assists you in making sure you get paid for the work that you do ... those days of waiting until your clients reach success to get paid, no more bounced checks or late payments.