Contents Preface ix Introduction xiii Temperament 1 1 Intervention 3 2 Calibration 19 3 Wedge 47 Everyday 71 4 Habit 73 5 Rhythm 91 6 Tags 107 7 Taps 129 Commonplace 141 8 Tactics 143 9 Threshold 169 10 Aggregation 187 11 Noise 203 12 Interference 223 Notes 241 References 287 Index 317