I usually follow 80 if possible, or in Java 100, but put a hard limit at 120. There's just a need for the occasional judgement call. This seems to work well en

I usually follow 80 if possible, or in Java 100, but put a hard limit at 120. There's just a need for the occasional judgement call. This seems to work well enough for two columns. Useful for editing, but indespnseble for diffs. For reference my 15" Mac has 234 columns at full screen.