Peppercorns -- I buy regular black peppercorns in bulk from Costco. Then I go over to World Market and get a small packet of pretty colored peppercorns -- pink, green, and cream. It's easy to mix them together and get a reasonable mixture for my clear pepper grinder.
Caulk singles -- Great idea from GE. Disposable, single use, clear caulk that you squeeze. I am going to buy dozens!
Big Baggies -- did you know that you can buy ziplocks (I think they are from Glad) that are 12x12? This the perfect size for scrapbooking materials. You can set up kits with cardstock, patterned paper, embellishments, and photos all kept together until you get around to making them.