The use of the syllabus and glossary is extremely essential no matter what mode of preparation you choose.
2) Use of Books:
Pick up a few books, along with copies of the relevant standards, and study them. The use of syllabus and glossary is again essential here as well.
You can have one of the best book that is entirely focused on ISTQB Certification – i.e. Foundations of Software Testing - ISTQB Certification : By Dorothy Graham, Erik van Veenendaal, Isabel Evans & Rex Black
Three types of guides for preparing for different Exams on "ISTQB Certified Tester" covering varying levels of expertise are available from Rex Black Consulting Services.
a) ISTQB Certified Tester Advanced Test Analyst Exam Preparation Guide Cost of the Guide 319 $
b) Many E-books & MS Powerpoint Presentations especially prepared by ISTQB Trainers. To get your absoultely free copy by mail, please write firstname.lastname@example.org) Instructor lead training courses: Offered by many Institutes available on the internet. Download the ISTQB Certification Preparation Help Guide