For small business the use of social media can be quite complex. This is because as a small business owner you might be using twitter and blogging and you might have a Facebook account you use to look chat to friends. However, a client might contact you on Facebook or even just examine your profile to assess whether they want to do business with you or not. The point being by can not specify who can examine public social media forums (i.e. you can not segregate the audiences). So, an few important questions need to be answered by small business to manage there public social media image.
Are all social media mediums going to be used to promote the firm? If not which ones will be and which ones will not be? If one medium is to be used for personal use only lets say Facebook, there several actions that need to be taken, firstly privacy settings need to be adjusted accordingly; secondly, you might want to use a persona; and thirdly you should use a different email address for business and personal accounts (as people can search by email for you).
Alternatively if you decide all social media should promote your business you need to ensure that you are full aware that each and every word or statement can be seen publicly. Thus your personal actions are public and can be accessed by business associates AND CAN have an adverse or positive effect on your business.