Self-control comes in limited quantities, must be replenished

Self-control, whether used to pass up the office cookie plate or to struggle against temptations like alcohol and tobacco, operates like a renewable energy source rather than a learned skill or an analytical thought process, according to new research.
Individuals had less physical stamina and impulse control and increased difficulty with problem-solving activities after completing a variety of tasks that required some measure of self-control, according to Roy F. Baumeister, Ph.D., of Florida State University.