Probably slightly late on this one, but I'll throw my thoughts in. I passed about a month ago, so its all still quite recent forme.
To pass, you need to know subnetting inside out, VLANs, all the involved routing protocols, Frame Relay, STP, hell anything that is on the exam objectives.
If there is anything you are struggling on, focus on it, it's the only way to overcome it. Oddly enough, I was having big issues with some of the CCENT stuff, but blazing through the ICND2 material, hence I failed the composite exam twice. I split the thing into two though, concentrated like mad, passed the ICND1, and absolutely nailed the ICND2.
Have you taken many practice exams at all?