Here is a link to an artcile about options available to individuals in the area of social media. There are many ways to effectively use these tools. Like anything else in life, you need to be selective with how you use your valuable time.
I think that by experimenting with various SM outlets, users get a feel for what they are comfortable with and what works. Using SM to contact other business professionals and people in your field can also be fun.
There are always security risks involved when entering data online so please be careful with where you post sensitive information.