> Always zero out your graphs
Great way to end up with useless graphs where you have a tiny line at the top that's been compressed to the point where you can't see any changes...
The "rule" about ensuring axes are zeroed is for bar charts not line graphs.
Agreed. The Wall Street Journal suggests setting the y axes so your data fits in 2/3 of the available space (unless you have a specific reason for a different setting, such as putting zero as the minimum for revenue).