i was recently sitting on a 3" rough country lift. then i got a set of 2" coil spacers and 2" lift shackles for free. so i added those in. i already had extended brake lines for a 5.5" lift. my shocks are about 1-1.5" to short, and my control arms were for a 3" lift. it works ok for now, but i do need to get some longer control arms and shocks.
oh yeah, an adjustable trackbar is also highly recommended.