I'm often asked whether I'm Citrix certified. For the past three years, my answer has been "no." Next question that bothered me is “How can I prepare for a Citrix exam?” My answer is always the same: “Login to vmexam.com for the exam preparation".
There are a few other things you need in order to succeed when you take a Citrix exam:
Field experience relative to the product(s) on the exam.
Access to the recommended training materials.
Online practice exam and sample questions.