Is it more difficult to trigger yourself than to be triggered by somebody else?
It certainly seems like it to me, as I've found that "email slave" works perfectly for me - as long as somebody else writes the mail. Even "cheating" (that is, writing only to my subconscious with "MUST DO") doesn't work at all. Well, I guess I'll just have to familiarize my SO with all the relevant trigger phrases, then...