I do. I don't have a special tongue scraper, but I brush my tongue with the toothbrush in the midst of brushing my teeth. I was always told it's a way of preventing bad breath.
My dentist preaches it. They gave me a little tool to use. I remember it about once a week or so. I brush inside my cheeks as well. Another dentist told us to do that many years ago. I still do it sometimes.