OK, Danielle, I'm going to suggest thinking about the parts of your work that you enjoy the most.

Your site suggests that you work mostly like an executive personal assistant, right? Do you like organizing, research, design...? If you can identify the area that turns you on the most, then you can configure a tagline around it.

For example: if you like organizing best, it could be 'Smart Office Management' or 'Wise Office Solutions.' Or if you like research the best, you could do: 'Your Indispensable Back Office' or 'Intelligent Office Resources.'

Know what I mean? Not to make the tagline actually say your major interest - you want to keep things open - but let it veer in that direction.

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Mary H. Ruth/Virtual Writing & Communications
http://www.writingVA.com