The golden rule for open data that’s useful is consistency.
Consistency means picking a naming strategy for your files then sticking to it. This makes it easy to spot that files are missing or out of place.
You’ll also want to keep your table headers the same for each new file so that anyone using your data, for example combining files, can do that easily. Changes to your headers break code and make your files harder to use.
Finally, keep your contents the same. ’12’ and ‘twelve’ aren’t the same thing. This makes it harder to use the information for analysis [see Tidy Data by Hadley Wickham].
Tip: If you can’t do maths on it, it’s text not a number.
See all the tips in one place: Good Quality Open Data