I don’t use WaitingFor, as alluded to above. It’s more of a mental perspective thing: I’m not waiting for someone, I have a next action, even if it’s “Check with Jim about the thing”. This is partly because my NA lists are index cards (one per context) I carry in my Moleskine, trying to adapt the Hipster PDA to my own needs, and partly because I feel this need to make sure that I’m not giving myself an excuse why something doesn’t happen. This is particularly important when working internationally; sometimes, constant followups to my coworkers are required just to get a response at all.