Don't try to remember everything; write down a list of what is written on the slides, in order, and DO read them before you put each one up? Vary your "intro" to each slide, "This is. . .", "and this next one is. . .", "to show that we have. . ." and after you read what is written on each, then glance up at the slide and back to messing with the next slide and reading the next/connecting info.