Well, I hope after reading Jason Snell`s tips I will have more confidence to grab the success online business via twitter in the future, Here are the Tips :

Don’t automate Your Twitter Activity
If you’ve got a blog that’s connected to your business, you can use a service such as TwitterFeed to directly channel your new blog posts into Twitter posts. Sounds nifty, doesn’t it? Well, don’t do it. Your business’s primary Twitter feed ought to be hand-fed. If you publish a flood of impersonal links, your Twitter account will just seem like a faceless promotion machine. And that’s not any way to engage people on Twitter. Link to the very best stuff on your blog, as well as relevant stuff you see elsewhere on the web, and also post items that don’t contain links at all. (Don’t forget to use a URL-shortening service such as tinyurl, is.gd, or xrl.us for your links.)
The Important of Answering each and Every mentions
People will refer to your company’s account as if it were a person. You should reply to tweets that mention you, when relevant. This will give your account more personality and will make those people feel engaged directly with the brand. For example, a person might ask you a question directly: “@macworld Hi. Do you know when Apple will enable SMS message forwarding on the iPhone? Thanks.” “@janevans35 Apple’s not saying, but we hope it’s with the next major software release!”
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Visit site and some more Good to bookmarks stuffs :
1. Using Twitter For Business In Public Relations Work
2. Tweets Censoring Will Never Happen