I do on occasion. There are times when I know that I need to work in a particular area or am trying to get something done before a deadline. I'll put an apt. on my calendar for that context if it's really critical. Since I work from home I can change my context to suit what I need to do most of the time, weather permitting, and there are some contexts that I avoid (@Computer Windows - I HATE working in Windows!) so if I don't schedule them I'll never go there or get those things done until they blow up on me.
Oogie McGuire - Mac, iPhone & Omnifocus
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Paonia, CO USA