Collin Brendemuehl tried to stir up trouble by asking:
"What are the photographic rules you live by?"
1. Use a tripod. I know most of us don't but I do a lot of long lens, macro and extended exposure stuff.
2. Carry a polarizing filter
3. Bring a macro lens - I can almost always find something interesting when nothing else is working
4. bring drinking water
Tom Reese