Its a bummer to miss by a few marks.
I that the Ed Roman book which can be downloaded in pdf form for free (forget where, might have been javaranch), is helpful.
I also found the EJB 2.0 spec, while heavy going in parts, was very useful in some sections. particularly for looking at XML layouts, which helped clarify certain aspects.
As I remember from other certifications, you should get a sectioned score which will help clarify areas needing more attention.
As you're going to have to pay for the next exam yourself, don't rush it, unless you have problems knowing what to do with the cash in your pocket. Neither feel that you have to aim for a high score, its a play off between economy of effort (time is previous) and comfort zone of passing (64 will do).