Try the hand slide. My daughter learned this from her speech therapist and I’ve used it a lot. When you think you’re going to block, slide your hand across your desk or the side of your leg. Any surface. Doing so distracts the brain and helps you slide through a block. You could do this on the phone all day without anyone seeing it. I have to do a lot of public speaking and I’ll often do a hand slide on the podium. Hope this helps!