I now perceive the world in 40 foot radiuses. When I walk into a room I immediately assess the potential xp gain of a fireball. When I choose a table at a restaurant I ensure that I am outside the blast radius of the point any logical wizard would target. When planning my wedding I ensured there would be a counter spell prepared by every member of the wedding party (I distributed enchanted flasks to the martial classes.) My home is a series of right angled hallways and all bedrooms are only accessible by ladder.