Practice a lot! As a FSA member you will receive discounts on the online assessment trainings of HelloTest. Hellotest offers specific practice materials for all major test publishers. Send an email to firstname.lastname@example.org to receive the discount code!
In addition, ask the company which test you are asked to make before you start preparing for the test. Do not hesitate to ask the recruiter for more information about the tests. It can also be useful to ask other students or employees of that specific company who already took the test for tips and tricks.