Compatibility

I've just realized how compatibility is not just for computers. Some toilet seats are not compatible with seat protectors. They slide right off. >-(

Viral growth

Viral marketing is truly remarkable. If you project even with conservative estimates and adjusting for market saturation, growth can go through the roof. Amazing.

Stratagem

Montezuma plotted his revenge from here.

-- by SS

Efficiency

If you have an idea and someone else tells you it's not so great... Then you insist, and after a long time they finally say: You know what? The idea was pretty good, we should do it. However, since it took so long to decide to do it, we feel this idea needs more resources to get done faster -- So it'll get done without you. I'm choosing to interpret that as me being efficient -- the idea is so good I've caused it to get done without actually doing it.