The day before a race always feels strange to me...it's one of very few days where I am not running and it always includes a race expo, both of which bring feelings of excitement and anxiety.
Maybe it is just my own emotionally-charged running-induced-endorphin-kick-happy self, but my stomach always feels a little uneasy when I walk into the expo. Maybe it's because my head is in so many places. Part of me is sizing up the competition (which, by the way is nearly impossible to do in endurance running), while another part of me is sizing up the vendors (to see which are giving away free stuff, of course), while yet another part of me is day-dreaming about the race tomorrow.
There have been times that I have left an expo with new gear, other times with a new race on the calendar, but every time I leave an expo I have left with that peaceful, nervous feeling.