When you are giving a seminar, you are “on stage” for a good part of the day. As you know if you’ve done any seminars (and as you’ll soon find out if you haven’t), there is a combination of exhilaration and exhaustion that occurs in conjunction with such performance. To be at your best, you probably need to “psych yourself up” to get into performance and selling mode before you start your seminar.
There are many ways of doing this. Only you can figure out what works for you. Some people use affirmations, others use meditation, still others use physical exercise. Whatever you use, make sure and put yourself into the right mental state before you start or your products sales will suffer.