If I have a list of household NAs, for example, and according to GTD I'm supposed to do them in order, how does the time it takes to complete an NA factor in here? If I only have, say, 1/2 hour right now I really need to look at only those things that fit in that time block. Does anyone use the time as a context, like @15min, @hour, @severalhours? Is there a better way to think about it?

thanks,

bb