I've never used it for business purposes, sure I mention if I'm offering a VA special or something like that but that was not the reason behind joining Twitter. It's always been a personal thing - just for fun type thing.
Oh back to your questions...LOL. I can say that it has been beneficial in driving traffic to my blog and even my VA website.
It doesn't annoy me when people Twitter about breakfast, lunch, dinner, etc. That's the personal level that I like - it makes me feel connected to my friends. Maybe I'm just weird.
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Toxic Free Blog - by Brittany Glynn
Brittany is a director of the Toxic Free Foundation and created the first ever Toxic Free Certification Program. Weekly, Brittany publishes the Toxic Free Blog and provides coaching to over 10,000 families in the United States alone. She is the author of a Toxic Free educational series and co-author of several Toxic Free learning programs. Brittany is also an award winning author.