Hi Michele-
You are exactly right. Last year, I purchased a domain name for a new endevour and I really loved that name. I later discovered there was a company with that name...they just didn't have the domain name. I don't understand that because personally, in today's marketing, you want your company name and your domain name to be the same thing.
Here are some steps.
Google the words United States Trademark and Patent Office. On their home page, you'll see Trademarks on the navigation bar. When you click on it, you'll see one of your options is "search." You can search and see if someone has your name. This is good but not foolproof. Someone could have filed for a trademark under your name and it just hasn't made it through the system yet.
Next, just google your name. Put quote marks around it as that tells the search engine to look for that exact phase. Such as "ABC Organizing." Do so in more than one search engine such as google, yahoo, aol etc.
Next, visit NAPO. You'll want to make sure you don't offend any of your future collegues by stealing their name. That is the National Association of Professional Organizers at
http://www.napo.net. (This is one of the approved links we are allowed to use on this site.)
You already have a domain name but for someone reading this who doesn't have a domain name, then they will also want to look and see if their business name already belongs to someone else as a domain name.
It takes a lot of research to find a name that isn't trademarked, that isn't used by someone else, that has an available domain name. Be patient.
One tip offered here in the past is to add your name or location to your company name to make it unique. Back to the example. Suppose you chose ABC Organizing but you want it to be more unique then it could be changed with addition of name or location into Chicago's ABC Organizing or ABC Organizing by Michele.