I find that cards like Battlegrace Angel and Nefarox have too high of a converted mana cost for a decent exalted deck. Also, you'll want some dual lands for it. Whether it's Guildgates, Temples, or Shocklands, it'll help you out a lot in getting the deck off to a running start. Above, datis_7 suggested Mourning Thrulls, but I find a great alternative to that card is Vault Skirge, as you can get it out on T1 by paying 1 colorless and 2 life. Having a T1 lifelink flyer helps TONS. You can check my decklist for a reference on how to make it much quicker, I just recently updated it. I still need 2 more Sublime Archangels.
Essence harvest is a huge asset in Exalted decks, as your creatures retain their exalted bonus until end of turn. You can drop the Harvest during second main phase to deal a heap of damage and gain it back in life.