GenM is one of our favorite services. Basically you can get an intern for 3 months, and get access to them for up to 10 hrs each week! These interns are learning about small business and all aspects of digital marketing, so they are eager to learn and help you out. Just realize that you really need a legitimate business presence and a plan for how they will be utilized over the 3 months before signing on.
If you want a part-time employee, just check out GenM. Oh, and you'll be shocked… SHOCKED at how low the pricing is, trust us!