Venus,
I'm assuming you're taking the civil pe transportation depth. Sorry to hear you didn't pass the first time. I also didn't pass on the first try but did on the second. Here's some tips for you which I hope you can use.
1. Don't get down on yourself for not passing and stay motivated to keep learning, doing problems, and be positive.
2. You have take the exam serious. By this I mean, doing numerous problems, taking practice exams, and dedicating a good amount of time to your preparation. Like any test, game, match, contest, the results will be based on how much effort you put in before the big day.
3. If possible, find a study partner or group to keep you on track. Be sure you both are on the same page as far as putting in a good amount time and are both serious. This will help a lot and push you both to do better.
4. Since you took the exam once, you know what to expect. Work on the areas that you didn't do well and be sure to make sure you are still good and items you did well.
5. If needed, get more material. I searched for more material and found Goswami's All in One PE guide to be really helpful. It was much more concise than the CERM. The example are much better laid out. I believe the NCEES released new study books. It wouldn't hurt to pick these up as well as they suppose to closest thing to the real exam. I am still waiting on a couple of my coworkers to get their new NCEES study books so I can verify this.
6. Practice, practice, and more practice. Do timed problems, take sample exams, put yourself in the real test situation. You don't know how much this helps. I didn't do this the first time and I was in total shock when I was taking the exam. It was about 4 years since I took my last final in college and that's a long time from taking a test. Like a boxer or shall I say UFC fighter, these guys prepare like crazy before the big day. They also go through numerous spars and try to put themselves in the real situation against their opponent. If they simply just ran a couple of miles and hit the bag there is no way they could do well. Same thing applies to the PE.
For me and many others, this exam was much more than just a PE exam. It was a life test and a test of will, determination, and I promise you, when you get that PASS letter it will be one of the top 10 best feelings of your life
Keep up the studying