I've never used STS for any exam. If you've revised all the work properly you'll pass. If you haven't you'll fail. It's really quite simple:

- Read a section of notes.
- Within 2 days, preferable the next day, review that section again.
- Within a week review the section again.

Each review should be quicker than the last. On the third time through the notes you'll end up reciting alot of the text. This technique works because it encourages the knowledge to move from short term to long term memory.

Initially you have to be rigid about your approach because you are in a state of "concious competence". Over time you'll start to automatically review data without referring back to the texts. At this point you are in a state of "unconcious competence" and you'll start to believe you have a photographic memory.

Get into the habit of learning properly and you'll find exams easier and you'll actually remember the information for years rather than weeks.

As far as specific OCP preparation goes, make sure you do any examples against a real server. This will make sure you know your stuff and you've not misunderstood any concepts.

Cheers