Mark,
You said -
"i used Boson and selftest to practice questions and all the time get 80 - 100 % pass."
You
DO NOT want to PRACTICE questions !!!!! You need to
LEARN the material FIRST and THEN use the practice tests to see where you are !!!!! Study the material, take the practice test and then look at what areas you need to go back to and study more, by just taking the practice exams you are learning THOSE quesations and are NOT ready for the real thing - why you have failed 3 times!!!!!
I have been saying here for many years - I sugest at the very least 2 books on the subject - one from Cisco Press (like Billy said above) and the other the CCNA Study Guide by Todd Lammel. Since you are working on ICND1 do as lerdalt said and go to Cisco and get the Exam Blueprint and then study that part from the CCNA book, it won't kill you if you study "too much", you will need to know it anyway!!!
You did not say ANYTHING about hands-on with a real Cisco lab - realisticly these are VERY HARD concepts that can be even harder WITHOUT hands-on practice - do yourself a favor and put together a Cisco lab as we have advised here many, many times, you have already spent enough for a lab in exam fees alone :-( Then you read about something - GO TRY IT IN YOUR CISCO LAB !!!!!! Learning by DOING !!!!! I have taught CCNA in a Cisco Network Academy for 10 years - I kind of know a little about this!!! On that subject ........
You also may want to find a Cisco Network Academy in your area and work your way through the 4 classes for a detailed learning experience!!! This might be very advisable if you plan to try and find a job in this area - passing the exam
WITHOUT a great grasp of the material will not get you very far!!!
As lerdalt said -
" It is very doable, but if it was easy, everyone would be doing it.
Good luck
E.A. Broda
CCNA, CCDA, CCAI, Network +