In my last two games we had our 9-year-old daughter roll one set, and everybody used it and rearranged as desired. When I play, I usually roll 4d6 drop down the line and assign class based on how it goes.
For my next game I'm going to try a new method I recently learned about:
1. Pick a stat. Roll 5d6 and drop the two lowest.
2. Pick two stats. Roll 4d6 and drop the lowest for each
3. Roll 3d6 for the remaining three stats.
I made five test characters using this method and was pretty happy with the result. Of course, this is for an OSR game, and stats are usually less critical in games based on an older ruleset.