Start to build your search in one core database and then you will "translate" your search to other databases to ensure you are being as similar as possible (if not exactly the same) with your search terms and limiters.
It is always good to take a look at all of your databases at the beginning of your search setup to make sure you won't run into any major hiccups - such as no limiters, limit on search terms per search, etc.
For most of you for this assignment you might find that MEDLINE or PsycInfo is your core database and then you will adapt it for use in other databases.
Try using something like the final tab in the keeping track template I've created for you:
This resource will allow you to track a lot of the information that is required for your assignment, and will help you in case you need to replicate any steps as you are working through completing the assignment.
*Feel free to customize this to meet the needs of your topic and your style of Keeping Track.