Google Plus Ones
Social Proof is good for your website and brand. People respond to recommendations such as Facebook Likes and Google Plus Ones. Not only will it make your customers trust you more, they also have SEO value.
Be Professional and establish your personal image as someone who wants to be networked with. Linkedin is known as the professional Social Network so if you have a lot of connections, you look more professional.
You know the concept of no one wants to eat at a restaurant with no customers or be the first to a party? Your Twitter account can be the same way. Give your new account some visitors so people won't be shy in following you.