Measure twice, cut once.
It's easy to make decisions on matters for which you have no responsibility.
There's a 50 percent chance of anything. Either it happens, or it doesn't.
Pack your own parachute.
If perception is reality, what's reality?
If you don't measure it, it won't happen.
Criticize behavior, not people.
The real world is only a special case, though an important one.
Customers want 1/4" holes, not 1/4" drills.
Never try to teach a pig to sing. It wastes your time and annoys the pig.