If you're having trouble finding a corset that fits at Wal-Mart, check out this MetaFilter post. Follow the links to find all the period attire you'll need to participate in next year's Pretend to Be a Time Traveler Day.
2) The Past - This one is more for beginners. Basically dress in period clothing (preferably Victorian era) and stagger around amazed at everything. Since the culture's set in place already, you have more of a template to work off of. Some pointers:
- Airplanes are terrifying. Also, carry on conversations with televisions for a while.
- Discover and become obsessed with one trivial aspect of technology, like automatic grocery doors. Stay there for hours playing with it.
- Be generally terrified of people who are dressed immodestly compared to your era. Tattoos and shorts on women are especially scary.