Hi there
Great question and indeed its important to prepare for the SOVA test. The SOVA test contains 2 sections:
A. First section covers a personality assessment which looks at behavioural preferences to various work scenarios
B. Second section covers numerical, verbal and logical reasoning questions
From personal experience with the SOVA test, I can vouch for the following approach:
1. Identify areas of improvement: Attempt the free sample SOVA test. This is available on the SOVA website. It should give you a good idea about the test and also where you stand in terms of improvement areas.
2. Work on improvement areas: For the first section, you may want to check out YouTube videos to avoid some common pitfalls. Use GMAT Prep books to work on improvement areas of the second section.
3. Prepare for timed tests: Working professionals might find a timed test over-whelming particularly if its been a while since they last gave an exam. Useful to give a few timed sample GMAT tests to bring back the rhythm and confidence.
Do get in touch in case you have further questions!