trade secrets ;)
The client will always ask you if you are available Tuesday. Always say yes. The job will inevitably get postponed
The most ironic technical thing you'll ever learn, is that image stabilization actually blurs images if they're shot from a tripod.
The last 10 percent of a job is 90 percent of the work.
Break a rule every day. But not that rule.
Keep your opposite muscle in shape. Always be ready to look at the flip side of any idea or concept.