-Adopt consistent file naming conventions!
-Name your files something that alludes to their content or purpose.
Example 1: Data for a class's second lab. Poor choice: mydata.dta Better name: lab2census.dta
Example 2: You download US census data for your final project for the year 2000; name it census00.dta. Then you create a subset containing only women ages 18-30; name it census00fem.dta.
-If you have multiple versions of the same file, add increasing numbers to the end of the file (e.g., census00v2, census00v3, etc). If you go back and make changes to an earlier version of the file, save a copy with the next highest number (e.g., census00v4).