One of the more mundane but useful forms of magic is called "Murphy's magic." Murphy's first law goes: "If anything can go wrong,it will." But the corollary to Murphy's law is that what you don't want to happen will happen. So, you can sort of use Murphy's law to make things happen. For instance, if you wash your car, it will rain (unless you wash you car just to make it rain, in which case, it won't). If you smoke, and you light a cigarette at a bus stop, the bus will come, and your will have to put out the cigarette. When you go to the doctor's office, if you don't bring a book you'll have to wait for a long time, and the magazines will be unreadable or nonexistant.