I was one of the lucky ones, bonds/leases actually made sense to me (everything except restructuring loans). Not sure what type of problems you're specifically having issues with, but here are some of the items that helped me in that section:
I would agree with @rlg5150, make sure you're comfortable with the amortization tables, that will help a lot.
One other item that was helpful was getting really comfortable with (or just memorizing) the journal entries. In fact, for most FAR topics, if I was able to understand and memorize the journal entries, it was a lot easier to do conceptual questions because I would try to put the scenario into a journal entry.
With discounts and premiums, I always thought of it in terms of the fact that a company can slap whatever coupon rate they want on their bonds, but investors may not agree with that rate, and the way to adjust the amount of interest an investor is actually EARNING, is to adjust the price of the bond. So if a bond pays 10% and the investor demands 12%, the price of the bond has to be lowered to synthetically create that higher yield. If the investor only demands 8%, the company will have an opportunity to increase the price of the bond, and to earn a premium, in order to lower the yield.
FAR - 81 (07/24/2012)
BEC - 92 (10/06/2012)
AUD - 92 (11/29/2012)
REG - 88 (02/28/2013)
Ethics - 90
California Licensed CPA - 12/2013