Here is some info from the book "Growing beyond Survival: A self-help toolkit for managing traumtic stress", by Elizabeth G Vermilyea.

She talks about using grounding techniques to stay in the present using all 5 senses, for example:

Sight: watch or clock, current photographs, outdoors, driver's license
Sound: soothing music, nature sounds, familiart sounds, your own voice
Smell: scented candles, potpourri, scented lotion, essential oils
Taste: peppermint, cinnamon, lemon, chewing gum
Touch: lotion, a stone, ice cube, pets

So perhaps you can bring some of these items with you for the drive, and bring them into the office?

I like her book because it uses techniques I might actually try...some books are just worksheets that tend to make me zone out more...

emmy

Link to amazon for the book:

http://tinyurl.com/6upxe