If your job REQUIRES you to pass the level 1 exam, then I would say that should be enough motivation to study hard and fully prepare. What are the consequences to your career if you do not pass level 1 the first try?
I fortunately completed all three levels on the first attempt. I also studied less than anyone else I have ever met for the first two exams. For Level 1, I spent one day reading through the ethics and working through practice problems. For Level 2, I only studied about 30 minutes the day before, before realizing that it was fruitless to try and cram. However, for Level 3, I was not willing to take any chances, and I put in about 200-225 hours of total study time in the 3 weeks before the exam.
How could I pass without "studying?" As an undergraduate, I studied finance/econ/accounting/math. As an MBA candidate, I focused on finance/investments. I also earned my Ph.D. in finance, and at the time of the exams, I was teaching courses in corporate finance, investments, and asset valuation. So in essence, my career and educational path was preparing me for the exam.
Unlike what others have stated, the pass rate is not randomly decided. A committee of charterholders/professionals decide the minimum criteria for what should constitute a pass for each exam. The committee goes through each question. There is no rule as to a minimum pass score, but generally speaking around 70% seems to be the threshold. When 100,000 candidates take an exam, there will always be a large clustering on the borderline. It is always rumored that some question topics are weighted more heavily, such as ethics.
One of the most interesting aspects of the CFA Institute is their financial statements. At the end of 2010, the Institute was sitting on $35.7 million of cash and $198.2 million of long-term investments. Thus, this "non-profit" organization has $233.9 million of liquid assets just sitting around. Why? This amount has only grown larger and larger over time. Employee salaries and benefits topped $53 million last year. This is a very rich organization that pays its executives and officers huge salaries, while charging candidates outrageous exam fees. When you sign up for the exam, you become a cash flow annuity to the organization in the form of registration fees, and if you pass all three levels, future membership dues. I once estimated the PV of this annuity at approximately $5,000-7,000 per candidate.