If you don't have a refractomer, I'd recommend one for sure. As for salinity, try here for some reading by searching, or visit Reefkeeping Magazine, or Advanced Aquarist, and make your choice from there. A lot of people succeed in this hobby doing something different from the next person, so there is no straight up right or wrong answer for a lot of this hobby.
I record my parameters in an excel sheet, however I used to use a notebook. Its useful for references and spotting trends. It might help you in the future to watch for changes or pinpoint the source of some problem.
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