While it would be nice if the programmer never had to worry about this situation in the first place, when confronted with something like this I use runtime.Gosched() rather than a sleep call to yield. It more directly performs what you're attempting to do and is much more clearly self-documenting for situations where you really don't need to sleep for whatever period of time but do need to yield.
I hadn't seen runtime.Gosched() before, will take another look at it. Mentioned it to a coworker and they already knew of it, so maybe it was always switched to call it instead of sleep. :)
