some software such as OUTLOOK doesnt enable easy add/delete contexts (especially for me, maybe i am not a power-user yet :/ ) I find clicking and scrolling through long list of contexts and select is a burden to me.
for non-key people, i will stick to @agenda context. i will assign my next action like this:
@agenda- ALEX- confirm actions on project xyz.
same goes to my @BUY list. example:-
@BUY- BOOKSTORE- BOOK: GETTING THINGS DONE, DAVID ALLEN.
@BUY- BOOKSTORE- STATIONERY: 3X PEN REFILLS
@BUY- HYPERMARKET- EGGS- 1 DOZEN