I usually do the same in presentations, the slides acting as orientation for the content and no further notes. I usually find it very useful to print out all slides as handout with six slides per page, and to spread them on the lectern in front of me whilst I talk. This helps to avoid turning around to look at the screen during the presentation and makes it easier to link between topics and slides.
Somehow I ended up in the kitchen preparing an extended midnight snack (Steak Diane with pasta) instead of working and despite my resentment of cooking. Arrgghh, now I'm even more tired. But I have to fight!