[ttrapani]

Most of how I've seen context used is as a location of work. I tried that and it never seem to work for me. I changed to using context as the type of work (with a few specific locations thrown in as needed). This was born from my @Mac list expanding to contain 90% of all my list. List now looks something like this:
@Writing
@Graphics
@Follow-up
@Study
@Decisions
@Phone
@Reading
...and so on. I only tie location if a specific resource is required. Most of the time I have my laptop with me so I can work just about anywhere. My calendar is blocked with these items. I know on Tuesday mornings I block an hour for doing my follow-up tasks. This new perspective of contexts has helped me tackle a much larger % of my action items.

This may not work for you (as it does deviate a bit from true GTD dogma) but it may spur you to more creative ways of using context.