Move around. Don’t stand transfixed on one spot of the stage—that is, behind a lectern, pulpit or microphone stand. Once you stop moving for long spells, you become part of the background.
Backgrounds get a cursory look at the first glance but, over the short run, attract no attention except from house flies.
A word of caution: don’t overdo the moving-around-the-stage bit, or you will make your audience dizzy following you.
Stage blocking should be calculated and precise, using economy of motion, so that your stage movement is efficient and pleasing to watch.