I used a lot of gradient map, since I can't buy magic bullet looks.  Gradient map is in the FX section of sony vegas, and it comes with some presets.  I recommend using the "Add" function instead of the "Blend" function; then you can adjust the colours until you get one u want.  Bump map and flashes are a must.  And pan crop if you want.  Also need to know how to smooth: http://www.youtube.com/watch?v=LGTjgrt94bI  -  Just follow that tutorial.  For smooths type in console "cl_drawhud 0" to remove everything except the view of the camera.