Reality Revisted: Friday 13th special

The universe is filled with little things that move around in space and bounce off each other, but color, sound, smell, as well as more basic things like solidity are all functions of our brains interpreting said things. What we consider to be reality would be the things we can all agree on that aren't dependent on interpretation.

Religion, political views, definitions of good and evil become part of reality when groups successfully force acceptance on everyone else, and how well they can suppress inconsistencies.

What other aspects make something a reality, and how can we be successful in proliferating our realities for fun and profit?