If I remember correctly, Tholey’s Combined Technique, at least as it was presented in his “Techniques for Inducing and Manipulating Lucid Dreams” in Perceptual and Motor Skills, also encouraged attempts to recall what had occurred previous to the moment of asking the critical question.
Tholey’s Combined Technique is still a favorite of mine, as it encourages an attitude critical-reflection in waking life as well in one’s dreams.