For speakers, this includes seeing yourself as you appear in a favorite photograph where you look fabulous and exude confidence or hearing your voice on an audio tape. Take along a tape recorder with a tape of yourself delivering your speech for reassurance and another tape with relaxation sounds or soothing music to lull you to sleep. Some of these are chamomile, jasmine, lavender and pine. You can buy these natural aromatic oils in specialty shops. Put the aroma on a kleenex and sniff it inconspicuously.
Aromatherapy is often beneficial for falling asleep.
Using smell to relax is different than using it for visualization. Men seem less concerned, but it is an important consideration for them as well. What you wear should make you feel secure, confident, and assured. This is what you want to wear. If you buy a new outfit immediately before a speaking engagement, you risk feeling physically uncomfortable because the garment restricts your movement.