Redstone lock: a block which provides you with a key to toggle its redstone state.
AND, NAND, OR-gates
Armor
Lott Boots: Prevent fall-damage
Recipes
Black Dye from Charcoal - A bowl, a bone and some charcoal make black dye. Animal-friendly.
Brown Dye from mixing - Add red, yellow and blue dye together in a crafting bench to get brown dye (instead of searching for cocoa for a thousand years)
Bleach - You need Salt, a bottle, and some redstone to get the bleach.
Salt - Put a bottle of water in a furnace, burn the water away and keep the salt!
Lamps - The proper colored dye surrounded by redstone gives you some lamps
String to Wool - The almost famous addition to the pack. 4 strings make 1 wool.
White banners from bleaching - Add any colored banner with some bleach to a crafting table to get the white version.
White beds from bleaching - Add any colored bed with some bleach to a crafting table to get the white version
White carpets from bleaching - Add any colored... yeah, you get it.
White wool from bleaching - .... needs explanation?
String from silk string - Combine four silk string to get a string
Slimeballs from milk, caramel and honey. As long as it sticks...