Simplifying Multi-Jet QCD Computation
  These lectures give a pedagogical discussion of the computation of QCD tree amplitudes for collider physics. The topics reviewed are: spinor products, color ordering, MHV amplitudes, and the Britto-Cachazo-Feng-Witten recursion formula. The lectures were presented at the XIII Mexican School of Particles and Fields, 2008, and at the LHC Physics Summer School at Tsinghua University, 2010. 
Michael E. Peskin
hep-ph