...nevermind him, he's a little bitter...🙂
See the other recent threads on this topic.
But seriously, prepare for USMLE with FA, Secrets, Crush, whatever plus USMLEWorld or Kaplan QBank. Do a lot of questions--that's the best prep.
For the COMLEX, I studied one day for manip and it was sufficient, but I know my manip pretty well already. It was mostly sympathetic innervations and then a couple of cranial or other Q's that you can't really prepare for.
Neither one is as bad as Step I.
Best of luck.