I'd second dstrong on the torque wrench. I got one for my last build and it not only helped for peace of mind, but it sped things up immensely with a ratchet tool that is the perfect size for working on a bike. I have the Shimano Pro one that came with all the bits for a huge bonus. just make sure you grip it at near the rear and not up near the front like I did for one bolt that I overtightened.
http://www.pro-bikegear.com/publish/...-PR100340.html